DIY Doctor UK DIY Forums

Hi, have just put my central heating on and all radiators are functioning fine except for the one in our bedroom.
Have turned the thermostat valve (on the end of the radiator) up to full and have checked for air but it's stone cold.
We have an Alpha combi boiler, all radiators have thermostatic valves except for the hallway radiator which is static.
Help, our room is freezing!!
Kim

Hi Kim,
I had a similar problem as you describe. What had happened was that the little brass pin which the thermostat valve acts upon had become stuck shut so it didn't let hot water in the radiator even though you open the valve. It should be a simple job to remove the thermostat valve. Mine was held on by a metal ring which I prised off with two screwdrivers. I then pulled the brass pin up with a pair of pliers and gave it some WD40. It's a bit fiddly to get the metal ring back in place but I reckon this might do the trick. The result will be instant ! Andy

unscrew the trv (thermostat) head and see if the spindle is stuck down, if it is you can either give it a hit with a big spanner or get a pair of grips and force it down a few times until it pops up. that's the fault 9 times out of 10.

Hi Kim,

Take the TRV head off, it won't leak, it's prolly the pin is stuck down.
Gently move it with pliers up and down a little and a spray of WD40.

Hth

[quote="kimarie"]Hi, have just put my central heating on and all radiators are functioning fine except for the one in our bedroom.
Have turned the thermostat valve (on the end of the radiator) up to full and have checked for air but it's stone cold.
We have an Alpha combi boiler, all radiators have thermostatic valves except for the hallway radiator which is static.
Help, our room is freezing!!
Kim[/quote]

Probably not a lot of help but I have the same problem with the added issue of the towel rail in the bathroom being constantly on. I need help too!