Why is one radiator not heating up?

Question

All my other radiators work fine, but one stays cold even when the heating is on. What could be causing this?

Chas · Answer

Valves on rad faulty radiator may be blocked heating system may not be balanced correctly

Hassan · Answer

Could be blockage, radiator valve are shut or your heating system needs balancing

Malcolm · Answer

As guys said before it could be thermostatic pin in valve but have u had heating off  since the summer as it could be a sagging heating pipe under floor that have Sludge solidified in pipe so maybe need a cleaner in heating system to clear but if this doesn’t work the pipe may have to be cut out, hopefully not?

Jewel · Answer

Valve could be stuck, balancing or powerflush to remove sludge

Shinay · Answer

Maybe the valve is stick or air in the radiator try to blead it first

Stephen · Answer

It could be a sticking pin on the Thermostatic valve ( there'll be youtube videos on this) or could be a slight blockage or trapped air, the best way to resolve these is to turn all your other radiators off on the valves and that will direct all of the boiler pumps power to that one radiator and clear the likely minor blockage, once working turn all the others back on and it will stay working now that its cleared.

Chris · Answer

Most possibly the radiator valve is either not opening up or there is a blockage

Chris · Answer

Could be blocked air locked or turned off would need looking at or you could try turn all rads off an see what happens

Ralph · Answer

Try bleeding radiator with vent key.
Do you have a thermostatic radiator valve fitted on this? if so take head off and pull pin that may be stuck.

hope this helps

Simon · Answer

The pin is probably stuck on the thermostat valve. Bit of WD40 and give it a wiggle

Why is one radiator not heating up?

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