Radiator cold until bled

andys123 · 11 Nov 2010

Hopefully someone can help!

One radiator is always cold. The pipe to the lockshield valve is slightly warm, pipe to the thermostatic valve is cold - both are fully open.

Thermostatic valve pin moves freely and have tapped it a few times to make sure.

If I bleed the radiator and leave the water flowing it starts to get a bit warm at the top and both pipes get hot

Many thanks

seco services · 11 Nov 2010

if the rads full of air before you bleed it then it won't circulate till bled.

andys123 · 11 Nov 2010

Thanks - water starts flowing as soon as I turn the bleed key!

Just tried closing the shieldlock valve and leaving the thermostat valve open - water flows from the bleed valve but if I push the therm valve pin in it stops - so I assume the valve is actually working! The water coming out of the bleed valve is warn too.

Am I right in assuming that the radiator may be sludged up?

kevplumb · 11 Nov 2010

Just tried closing the shieldlock valve and leaving the thermostat valve open

open them both
then shut down the working rads

and

system is

does it have a bypass fitted

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Radiator cold until bled

andys123

seco services

andys123

kevplumb

DIYnot Local

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