Help me prove my husband wrong

[anjlegs]

Towel radiator in our bathroom won,t get hot, is this because we have fitted a thermostatic valve. the valve is set at highest temp but still only ever gets luke warm.

[terence7556]

did you take off a lockshield to fit the trv?one radiator in the system should NOT have a trv on it. it can be in the hall but is usually in the bathroom and is known as the bypass rad.
this is to allow the pump to send water around the system, if every rad had a trv and closed down because it was hot enough then the p[ump would meet unnecessary resistance and wear out more quickly

[eltelioni]

Any husband is always wrong.

There are a few possible explanations.
If the radiaotr gets hot at the bottom, there may be air in it. Have you tried bleeding it?
The thermostatic valve may be stuck. You can unscrew and remove the thermostat part and you will see a metal needle protruding. Try moving it in and out - but be careful not to pull it out completely.
Your heating system may not be balanced, so all the hot water is going to the other radiators in preference to the bathroom one. Did it work better before fitting the thermostatic valve?

Does your bathroom radiator come on even when the rest of the central heating is off? Does it get hot whenever the boiler is heating your hot water? If so, it may be a bad idea to fit a thermostatic valve because the rasdiator provides a path for the hot water when the hot water valve closes. Not all systems work this way, but some do.

[anjlegs]

Thanx for your help the radiator does stay on when the water is on tho hubby says its on the heating circuit !!
The radiator we had in there previously was always hot.

[eltelioni]

I think you need to heed terence's warning before worrying about why the rad does not get hot - sorry terence, I did not see your reply before I posted mine.

Was the thermostatic vaslve fitted by hubby or by a plumber?