My radiator (s) are on all the time or won't turn off

One or two radiators won’t turn off but not all

This is likely to be an issue with the thermostatic radiator valve (TRV).

Thermostatic radiator valves work on room temperature, not the temperature of the radiator. The higher the valve is set the longer the radiator will stay on and heat the room up to a higher temperature. If you set the valve low, it should shut off sooner and the room temperature should stay cooler.

Try turning the thermostatic valve completely off. This should turn the radiator off, and it should go cold.

It is also possible to turn the radiator off using the lock shield valve at the other end of the radiator. These will usually have a plastic cover on the top, which you need to remove first. Then you need to turn the valve in a clockwise direction using a spanner or pliers until it stops. This should turn off the radiator. If this doesn't work, report a repair.

Some radiators won’t have a thermostat on them. These are usually when the radiator is in the same space as the room thermostat or on very old systems. If the radiator is in the same space as the room thermostat, it should be always left on, to keep the central heating system working.

None of the radiators will turn off

Make sure the room thermostat is turned down or the programmer is turned off.

I’ve got a combi boiler

If you have a combi boiler, you might have a battery-operated programmer/thermostat. Sometimes when the batteries in the programmer fail, the heating will come on, even if it's turned off. This shows the batteries may need changing. Change the batteries with good quality batteries like Duracell as cheaper batteries won’t work as well. There are various types of battery powered programmers, so how you remove them from the wall can vary.

With Baxi programmers located on a wall, you will have to put a flat headed screwdriver in the slot underneath and twist, the front should pop off.

Danfoss programmers have a single slot underneath. Insert a screwdriver or a similar object into the slot and push upwards. The programmer should pop off.

If the programmer or thermostat is mains powered, do not touch it.

Alternatively, you can turn the heating thermostat down on the boiler, and this will also stop all the radiators getting hot. Remember to turn it back up when you want the heating on again.

I’ve got a heat only boiler with cylinder tank

If the boiler is heat only, this type of fault could mean there’s an issue with the motorised valve in the airing cupboard.

If you can’t solve the problem, you can isolate each radiator using the thermostatic radiator valves, if fitted, on all the radiators you don’t want on.

How do I report a repair?

You can report a repair to us at anytime, anywhere using My Account or contact us via Live Chat. Let us know when reporting that you’ve followed the advice and what you’ve tried to get it working, this helps us to assess what to do next to get the right person for the job.