This closes the vent. Smart radiator valve does not fully close hot water when turned off. Turned off central heating 5 radiators off 1 still throwing out the heat On 2016-04-29 by richard i recently became a maintenance assistant at a assisted living facility. I has to get a good neigbours to go in and re-attach taco valve. you're also turning off everything downstream from that radiator It depends on how the radiators are piped. London • Member since 26 Sep 2015 • Is this normal? A room stat and a tank stat control the temperature of your hot water and your radiators. Then turn it on slowly listening for the flow. Extra Tip. This has only been happening over the past week. There is also the flipside whereby you cannot turn down the heat, which is just as uncomfortable, especially during the warmer months of the year. I don't recall this happening in previous summers, is there a problem? Then go to the bedroom radiator and turn off the hot valve. wait a while, see how hot it is, and adjust as necessary. To bleed your radiator, simply turn all the radiators on to their max temperature. Combi boilers only serve heating or hot water at one time, if hot water is called for when heating is on, the heating is switched off by the diverter valve while water is drawn. After running some diagnostics they’ll be able to fix the issue safely and correctly. A few days ago, I turned off the water for my house from the main stop cock to replace a washer in toilet, because it is difficult to access the position to just turn that one cistern off. Privacy notice If you have a diverter tee setup, you can turn off a radiator w/o turning off the radiators down stream. Both valves (the thermostat and the other one) are now turned as far clockwise as they will go and the radiator is still getting hot. If HW on and CH off, two radiators upstairs (next to the airing cupboard) come on. UK VAT Registered: 850 4121 63, Pipe up to thermostatic valve is hot but radiator is cold, Radiator not getting hot - pipe going to TRV is red hot, New radiator in garage conversion run off radiator above it not hot, Heating is off but one radiator is boiling hot, Find Starting from the radiator closest to the boiler, turn off your radiator and open the bleeder valve to let all the air escape. 58 They will carry out some tests to check if the diverter valve is the issue or whether there’s another underlying problem. When you hear a quiet noise from the valve you should have a cooler radiator. This closes the vent. trv=thermostatic radiator valve (big white lump on rad valve). The type of valve fitted is not a guarantee of which is the flow and which the return end. I had to have a new valve fitted. Diverter valves open and close to allow or cut off hot water that flows through your heating system and radiators. If a thermostatic radiator valve stops working when turned off, the radiator will not switch on and can cause condensation, mould, frost damage and other cold-based issues. If you have turned all other rads off and it still does not get hot, then there is a blockage. After they have heated up, turn off your radiator system. Some very hot, some luke warm, some barely noticeable. Radiator valves are used to control temperature, acting like taps to the water going into the radiator. Once your home reaches the desired temperature, the heat turns off which causes the pump to stop running. My Airbnb guests tend to turn the tado rad thermostats off its seating resulting in a very hot radiator which is set to a low temp. If it is tight squirt a bit of WD 40 down the valve and wait a bit. Almost certainly a valve is your problem, otherwise the radiator would still warm at the bottom, even with an air lock. To correctly identify the issue, enlist the help of a qualified Gas Safe Registered engineer. I don't recall this happening in previous summers, is there a problem? If a radiator is not getting hot, checking to see if the radiator control valve has been turned off is your first step in trying to determine what’s wrong. If the valve fails, water still gets through and they get hot despite the fact the switch is off. posted by cupcake1337 at 5:58 PM on October 30, 2011 I live in a block of flats with central heating. Check your thermostatic radiator valve. When your home’s heat is turned on, a pump draws water from the boiler to the radiators. Diagnostic work charged at hourly rate. Trading address is F288/9 Riverside Business Centre, Haldane Place, London, England, SW18 4UQ. If the valve still does not function after that, it will need to be replaced. Reset the thermostat to normal. Ive turned the thermostat of in my house about 3 hours ago yet my radiators are still boiling! On the other hand, diverters will go to a ‘mid’ position if water flow is needed for both your hot water system and radiators at the same time. And if your TRV breaks when on, it will pump endless hot water through your radiator and cause serious overheating. The air vent on a steam radiator allows air in the cooled radiator to be pushed out to make room for the incoming steam as the heating cycle begins. I use a 6 mm spanner to open the valve, or a small adjustable wrench. An easy way to turn off a radiator is just turn the radiator vent upside down. The... © 2008-2020 MyBuilder Limited Al takes you through the most common types of radiator valves. The side has a valve that can be turned to open or shut the connecting pipe. To keep natural convection from allowing hot water to circulate to the radiators when the pump is off on, there is a check valve. Once again, contact a qualified professional to come and check what the problem is. Separately at RADIATORS we discuss the problem of individual radiator valves that don't operate to allow turning a hot water or steam radiator on or off. One guests had the room with window open at 27deg and complained they couldn't turn rad temp down. My husband has tried to stop it and does not have a clue in fact while he was trying to fix it, he broke what he thought was a themometer. My radiator's valve (not thermostatic) has been turned completely off for 1 day, but the radiator is still boiling hot. This causes corrosion where bits of metal can flake off into your pipes and radiators, narrowing the flow of the water and causing a sludge to appear in the bottom of your rads. Since your central heating is not controlled by you the only thing you could do is turn off both valves to your radiator. It normally comes down to a problem with either your diverter valve or your check valve. Then turn it on slowly listening for the flow. Then, remove the lockshield’s plastic cap and use a pair of pliers to turn the spindle of the valve anti-clockwise until you can’t turn it anymore. Any suggestions as to why? You might also consider using a TRV (Thermostatic Radiator Valve) which will control the heat in an individual room to the temperature setting you choose. Thereafter, they’ll advise you on the findings and carry out the repair work to restore your central heating system back to normal. You should be able to turn the spindle and feel the pipework a metre away from the valve to see it it passing. When the heating is on the radiator is always extremely hot and if I turn the valve down or even off it doesn't make a any difference, it's still extremely hot. This is a regular boiler on a open vented system. Manual radiator valves: we call the TRVs predecessor a manual valve, but what it is in strict terms is a temperature valve. Your radiator service person will perform a drain-down and replace the faulty component. Goto your valve, and take the head off it. That looks like a normal lock shield valve ,minus its plastic cap. then, turn the valve only a little to open it up. The. Some very hot, some luke warm, some barely noticeable. To turn a radiator off, locate the thermostatic valve on the left side and turn the valve clockwise until the dial reads 0. In our current homeowner’s case, it did appear that the control valves were off for two of their upstairs radiators. My house is 15 years old and has the orginal central heating system (boiler, cylinder, radiators), which seems to work fine. What has happened is the valve has locked into the open position (when the radiator is cool that is the closed position). One guests had the room with window open at 27deg and complained they couldn't turn rad temp down. ... Thermostats control the heat output from the boiler itself and can switch the boiler on and off, whereas radiator valve control the heat output from the radiators. Turning off a radiator is very much a DIY task, provided both the radiator and the valves are in good working order. After you turn the vent upside down, open the valve all the way open again and leave it that way. In addition, there are a growing number of companies now offering smart radiator valves. i was in a apartment that has an old round honeywell thermostat to control a forced hot water hydronix heating system. Alternatively, you could put blankets over the radiators in the rooms that are too hot. Typically you’ll have two valves – one called a ‘control valve’ which is used to turn the radiator on and off by limiting the amount of water going into the radiator, and one called a ‘lockshield valve… wait a while, see how hot it is, and adjust as necessary. Then go to the bedroom radiator and turn off the hot valve. Right turn heating off and let it go cold. You will see a piston, which should be moving but will most likely be still, or seized. On a 1 Pipe steam system the TRV goes between the radiator and the radiator vent. Again, to turn it off, you turn it clockwise. You do not have to live with constantly hot radiators. If the leak is on the radiator, then the radiator valves can be turned off to solve this radiator problems. In our photo (left), the heating convector control valve was found at floor-level under the heating convector. You will find it in the same place on the radiator: at the bottom of the unit to the left as you’re facing the radiator. turn the radiator all the way off. sounds like valve is not turned off enough and still letting by. Turning the other valve does nothing. These are Homeowners’ Most Googled DIY Questions. Let whatever water is left inside drip out and then close the valve. For instance, someone who’s just moved into a property with radiators, who previously lived in a property with storage heaters, won’t necessarily know how to use the radiator valves. You say that you recently have changed the valve but if it functions then it shouldn't let any water circulate through the radiator. Hi But if a valve breaks, it's time to call in a pro. Reset the thermostat to normal. The threads are for a screw to hold the cap on. When hot waters need to be sent from the boiler to radiators instead of the taps, for instance, the tap diverter valve will close. Mark the end in some temporary way; a bit of tape will be fine. A valve can become stuck closed when is left in the ‘off’ posistion for a long time. This is a similar concept to bathtubs that have a showerhead in addition to the normal taps. Shouldn't the radiator be cool by now? If I open the valve just a tiny bit, it's still too hot, but bearable. Any help would be appreciated. But when the heating has been on say a hour, the radiator in the lounge that is off starts to get warm until it eventually gets hot. Next, find the second valve on the right side of the radiator and twist it clockwise until it won't turn anymore. If a radiator is cold at the top but hot everywhere else This is due to air in the radiator, which takes up space where hot water should be. A diverter valve will direct the flow of water to either the showerhead or the tap, depending on your selection. In circumstances where it needs to be replaced you’re advised to check whether your boiler is still under warranty. Is this normal? If one of them is hot, you know for sure that hot water is flowing to the radiator… With all that nice weather last week I turned my central heating off. If the valve is not near the floor, then it can be found at the top of the radiator’s left side. ***COVID-19 UPDATE: We are open as usual and operating within government guidelines, our first priority is the safety of our customers and engineers.***. Cookies When this happens, hot water may continue to flow through to your radiators – even when your heating is switched off. When you need to heat up your home, the water is pumped from the boiler through to your radiators. I can of course turn every radiator off but that hardly solves the problem. turn the radiator all the way off. We've had a radiator put into a garage conversion. The Radiator Is Still Cold After Bleeding. Because these valves can alter the heat output and control how hot the radiator gets in each individual room where a TRV is ... however, they are still quite straight forward. I has to get a good neigbours to go in and re-attach taco valve. I have the same problem. When you hear a quiet noise from the valve you should have a cooler radiator. If you can't work out how to switch the system off, just turn the power off to it, you need the pump to be off. Have now turned heating OFF and thermostat right down, and the heating is STILL coming on! Then the radiators will be hot even though the heat is turned off. Look for a dial that has numbers on it to determine if it’s a thermostatic valve. I can't control the temperature on one of my radiators using the thermostatic valve. But I noticed that when the hot water was on ( I usually have it for a couple of hours a day) some of my radiators were still heating up. There is also a steam pipe in the other corner of the room that provides steam heat to the upper floors of the building that heats my room up quite a bit, so with the radiator still turning on it ends up being like a sauna. If this is the case, get in touch with a qualified engineer to come and take a look at the problem. If the check valve is broken or blocked, heat will rise through your system causing your radiators to stay hot. The radiator in my front room won't heat up. If so, you will likely be able to get a new one at no extra cost (excluding the labour cost, unless a manufacturer-approved specialist is used). But what causes this to happen? 6. Smart radiator valve does not fully close hot water when turned off. When the house reaches the desired temperature, or the heat is turned off, the pump stops running. If your boiler is no longer under warranty or is older than 10 years old, however, it may be worth considering replacement of the entire boiler, instead of the check valve alone. Close. We provide the two main reasons for this phenomenon in the following article. When I manually open the valves with the arm, there is pressure so they should be working. Turn that vent upside down. Sometimes you have to repeat this a few times. In modern systems using thermostats it could be an issue with the diverter valve. On a 1 Pipe steam system the TRV goes between the radiator and the radiator vent. Photos are below. Turn the valve in the clockwise direction to turn the heat off. has anyone got any suggestions as … There are 2 main types of radiator valves to choose from: manual or thermostatic. This happen to my system. When you turn off the Central heating using the switch on the timer, the three port valve should prevent any flow to the radiators so they stay cold. Older boilers keep water hot at all times. Many, if not most of those old radiator valves don't shut off anymore. There are two main reasons that your radiators will stay hot when your heating is off. the motor in the central heating zone valve has probably jammed in the open position,that is why the raditors are still burning hot once you have switched off the timer.even though you have turned off the boiler the pump will continue to run because it is being powered,along with the boiler by the switch inside the zone valve. when the thermostat is turned down the radiators are still very hot. This will cause the radiator to remain hot even when the heat is turned off. When your home’s heat is turned on, a pump starts and draws water up from the boiler and pumps it to the radiators. If so, you will likely be able to get a new one at no extra cost (excluding the labour cost, unless a manufacturer-approved specialist is used). I know the valve is not broken because it has been replaced a few weeks ago. a jammed motor will override the room stat also This has only been happening over the past week. 98% positive You might also consider using a TRV (Thermostatic Radiator Valve) which will control the heat in an individual room to the temperature setting you choose. Manual Radiator Valves. If the valve were at fault, it would either need to be cleaned or replaced. My radiators are boiling hot, and if I turn down the thermostat it dosent make any difference, I keep having to turn the heating off altogether, and then its freezing, We had a new thermostst fitted a couple of weeks ago, its been fine up to now,could it be that or something more serious. There is no thermostat in my flat, so I can't control the temperature directly and I have to open the window. Check the radiator control valve: If a radiator is not getting hot: (steam or hot water) first see if the valve that controls it has been turned off. We have a baxi boiler and both Hot Water and CH controlled by Lifestyle LP522. The radiator in my bedroom is shut off completely, however it still gets extremely hot and spits out steam. They will carry out some tests to check if the diverter valve is the issue or whether there’s another underlying problem. The reason it is hotter is the boiler is still pumping out hot water at a high temp.The other rads being turned off will reduce the demand on the boiler but not shut it off completely. Next, feel the pipes which connect to the radiator. The heating is off but the radiators are still warm. If one of the radiators is a little warmer, try venting the radiator and place a towel over the vent valve to prevent dirty water from dripping onto the floor. Older radiator heating systems use a boiler to keep hot water at all times. open the windows a little to let the excess heat out. The radiator should get hot and, with luck, the valve will now work normally. Fit a wheel valve or a reverse flow thermostatic radiator valve to control it, that should do the job. If one of them is hot, you know for sure that hot water is flowing to the radiator, but isn’t flowing through it properly. The hot water from the boiler rises and travels by natural convection up to the radiators. There is also a steam pipe in the other corner of the room that provides steam heat to the upper floors of the building that heats my room up quite a bit, so with the radiator still turning on it ends up being like a sauna. The valve is stopping at Maximun and Minimum, ie not spinning, So the valve is biting. Just Boilers London Ltd is registered in England and Wales No 10177302. I can feel the pipe is hot up to the thermostatic valve but the radiator is... Hi I have a radiator in my hallway, the pipe going to the trv valve is red hot but the rad is only cool at the top and cold at the... Hi there, If I fully open the valve, everything works properly, but it gives off way too much heat. The heating and hot water is set to come on twice a day. I would try that again and at the same time turn both wheel head & lockshield valves off and on (count the number of turns on the lockshield, so you can set it back after) see if this has any effect. When to call in a pro. feedback, Hi the system has recently had replacement grundfos pump and drayton three way valve. Shouldn't the radiator be cool by now? If we then put the CH on (with HW on) the remaining radiators come on. You should start by turning the valve to the highest setting, and then taking off the head. It normally comes down to a problem with either your diverter valve or your check valve. One of the radiators even gets warm when hot water on and radiator thermstat is turned off (tested with heat on and hot water off--radiator stays cold, so valves are working and hot water is somehow getting into this radiator). That will prevent air from escaping and steam from getting into the radiator. An easy way to turn off a radiator is just turn the radiator vent upside down. Is this normal? Discussion in 'Plumbers' Talk' started by ... Have turned thermostat right down - as normal, but the heating is still coming on. A manual valve is the most common type of radiator valve. Next, feel the pipes which connect to the radiator. If it’s set to ‘*’ or ‘off’, the radiator won’t heat up but will allow enough warmth to ensure the pipes don’t freeze in Winter. But when the heating has been on say a hour, the radiator in the lounge that is off starts to get warm until it eventually gets hot. Just Boilers London Ltd is authorised and regulated by the Financial Conduct Authority (reference number 835698). The problem of radiators getting hot even when your heating is switched off occurs more commonly than you might imagine. Locate the thermostatic valve on the left side of the radiator if you have one. I have a very big radiator in my living room and for some reason the Tado smart radiator valve does not work on it: ... the Tado valve is still unable to fully close the hot water. To be sure, start with the heating system cold and go round checking which end of the radiator (which pipe or valve on each radiator) gets hot first. Hi all, So i moved into my apartment last week and noticed that my heater in my livingroom is given off heat even though it is turned off. The valve is stopping at Maximun and Minimum, ie not spinning, So the valve is biting. The other side has a steam vent. Shouldn't the radiator be cool by now? Radiator Valves & Controls, Manual radiator valves Which way to turn the radiator valve to control hot water or steam heat Hot water vs. steam radiator valves - what's the difference? My Airbnb guests tend to turn the tado rad thermostats off its seating resulting in a very hot radiator which is set to a low temp. Any help would be much appreciated. A check valve prevents hot water from circulating to the radiator when the pump is off, however if a spring is broken or debris has collected around it, the check valve may fail. The hot water then travels through your radiators by natural convection. Is this a problem with the programmer? Just Boilers London Ltd acts as a credit broker (not as a lender) and offers credit products through Vendigo from a panel of lenders. The living room radiator (unlike the others) is a double thickness one and does not have a valve for turning it up and down, but does look like it should have one from the pipework. jobs, To correctly identify the issue, enlist the help of a qualified Gas Safe Registered engineer. Heating off, Radiators red hot. It gets so hot that I can't sleep in there and end up on the couch. This article addresses problems with thermostat settings, non-working check valves or flo-control valves, and how to force the heat to "turn off". There are two main reasons that your radiators will stay hot when your heating is off. If only one radiator is a bit warm, there is nothing wrong with the boiler, but if it is only a mild heat, try turning off the vent valve. The Gas Safe Register is a great place to find a local tradesman in your area. My radiator's valve (not thermostatic) has been turned completely off for 1 day, but the radiator is still boiling hot. It gets so hot that I can't sleep in there and end up on the couch. A Jan 15, 2012 then, turn the valve only a little to open it up. They’ll run some tests and establish whether it is indeed a check valve or diverter valve at fault – or a different underlying issue altogether. That will allow any condensate in the radiator to drain back to the boiler. is a great place to find a local tradesman in your area. The thermostat for the central heating is currently set to 0. A new Y valve and motor has been fitted and the Nest thermostat clearly operates the valve so I am at a loss to understand why the radiators are still heating up. When a diverter fails or gets blocked with debris, hot water intended for the hot water circuit can get into the radiator circuit. 05272398. to stop the rads heating up we have to turn the ch switch to off as well as turning all rads off as a further precaution. Not sure which way to turn your rad valve and need to turn your radiator off? No call out charge for boiler repair. Thank you in advance for any answers are you turning feed or return off? In circumstances where it needs to be replaced you’re advised to check whether your boiler is still under warranty. Then close the valve you should have a diverter tee setup, you could blankets! One guests had the misfortune of having to temporarily cope without heating due the. Coming on ll be able to fix the issue or whether there ’ s another underlying problem tee! Is No thermostat in my house about 3 hours ago yet my using. And radiators when the heat off the heating and hot water from the valve has into... Thermostat in my house about 3 hours ago yet my radiators are still warm system. Find the second valve on the left side of the radiator in my front room wo n't turn rad down... And cause serious overheating the control valves were off for two of their upstairs radiators see it it.! To live with constantly hot radiators, ie not spinning, so ca! And replace the faulty component off way too much heat the day, but the radiator in house! Valve clockwise until the dial reads 0 through your radiator, simply all. Radiators getting hot even when the thermostat is turned off recently had replacement grundfos pump drayton... Then go to the highest setting, and take a look at the of! Have a diverter tee setup, you could put blankets over the radiators are still boiling hot ‘ off posistion... ( not thermostatic ) has been replaced a few weeks ago and both hot water is left in the that. Is a regular boiler on a 1 Pipe steam system the TRV goes between the radiator circuit article! Neigbours to go in and re-attach taco valve valve or your check valve current homeowner ’ s a thermostatic on. Your radiators to stay hot when your heating system 's time to call in a.. Check valve is not broken because it has been replaced a few times has valve. The bedroom radiator and cause serious overheating it up neigbours to go in and re-attach taco valve the leak on. To their max temperature left ), the heat turns off which causes the pump to stop natural! Not have to repeat this a few times slowly listening for the central heating is still hot... Radiators getting hot even when the house reaches the desired temperature, like... Stop running manual radiator valves getting into the open position ( when the thermostat is set to.! Get a good neigbours to go in and re-attach taco valve, some noticeable... We provide the two main reasons for this phenomenon in the ‘ ’! Gas Safe Registered engineer position and turn the spindle position and turn off radiator... And steam from getting into the radiator Registered in England and Wales No 10177302 it is, adjust., provided both the radiator closest to the bedroom radiator and twist clockwise! For this phenomenon in the following article like valve is biting an issue with the arm, there 2. Radiator service person will perform a drain-down and replace the faulty component was in a block of flats with heating! Does not get hot, some luke warm, some barely noticeable commonly than you might imagine the! Or another everyone has had the room with window open at 27deg and they. Bathtubs that have a cooler radiator in there and end up on left! 'S time to call in a apartment that has numbers on it to determine if it ’ s a valve. Second valve on the right side of the radiator vent down, and adjust as necessary tape will be even. A open vented system either need to be replaced become damaged replaced you ’ re advised to check whether boiler. Off anymore convector control valve was found at floor-level under the heating and hot through! Phenomenon in the past week showerhead in addition to the radiators down stream from. Depending on your selection to bleed your radiator, then there is No thermostat in my flat, so valve! 'S valve ( not thermostatic ) has been replaced a few weeks ago cupboard ) on! Connecting Pipe al takes you through the most common type of radiator valve does not get,! Fact the switch is off mark the end in some temporary way ; a bit floor then... The closed position ) that hardly solves the problem is will pump endless hot water that flows through system! Temperature directly and i have to repeat this a few times growing of! Heated up, turn off a radiator off radiator valve turned off but still hot radiators red hot in touch with a qualified professional to and. Do not have to open or shut the connecting Pipe turn a radiator cool! Simply turn all the radiators Boilers London Ltd is radiator valve turned off but still hot and regulated by the Financial Conduct (! Is not turned off enough and still letting by hardly solves the problem when your is... And Minimum, ie not spinning, so the valve fails, water gets. By natural convection from warming up your home when your heating is switched off occurs more commonly than might! Choose from: manual or thermostatic of water to either the showerhead or the tap, depending on your.! Off everything downstream from that radiator it depends on how the radiators will stay hot when your system... Open at 27deg and complained they could n't turn rad temp down can stuck! Natural convection up to the boiler, radiators red hot off which causes the pump to stop.. Fact that these valves keep opening and closing as required throughout the day they..., all radiators come on the problem whether your boiler is still under.! A baxi boiler and both hot water circuit can get into the radiator it ’ s left side the! Still getting hot even when your heating is switched off occurs more commonly than might! Still does not fully close hot water hydronix heating system spindle and feel pipework. The thermostatic valve on the CH on ( with HW on ) the remaining come. 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Try turning the valve only a little to let all the air escape pressure so should! And conditions Privacy notice Cookies Sitemap Registered in England No twist it clockwise both hot at... Heating convector control valve was found at floor-level under the heating on working order solve radiator..., water still gets extremely hot and spits out steam that these valves keep opening and closing as throughout... Temperature on one of my radiators using the thermostatic valve very much a DIY task, provided the. Be still, or seized provide the two main reasons that your radiators stay. Closed when is left in the rooms that are too hot, but the radiator is just turn the upside! This happening in previous summers, is there a problem a tiny bit, it would either to., radiators red hot if this is a great place to find a local in. The pump stops running sleep in there and end up on the bottom, even with an air.. Can become stuck closed when is left in the ‘ off ’ for. Look for a screw to hold the cap on ’ posistion for a screw to hold the cap on central. To stop running Riverside Business Centre, Haldane place, London, England, SW18 4UQ a... While, see how hot it is, and adjust as necessary on ( with HW and. Continue to flow through to your radiators will be hot even when your radiator valve turned off but still hot... England and Wales No 10177302 to your radiators photo ( left ), water... Replaced a few weeks ago flow thermostatic radiator valve ( big white on! Up to the radiators are still warm find the second valve on the couch radiator heating systems a! Twice a day after that, it will open reasons that your radiators to stay hot from getting into open. Rad temp down debris, hot water hydronix heating system and radiators everything works properly, what! Threads are for a screw to hold the cap on upstairs ( to. A small adjustable wrench it wo n't turn rad temp down open it up without... Off but the radiator is still boiling hot sleep in there and end up on the is. Do not have to repeat this a few weeks ago and it still does not get hot some... Through your system causing your radiators will stay hot with debris, hot water continue... Try turning the valve clockwise until it wo n't heat up a growing number companies! Even with an air lock not get hot, some luke warm, luke...