New answers tagged radiator
Without the manual I can't tell but my guess is the green tab sets the turn on temperature and the red stop is the turn off temperature. Set the green up to 25°C and see what happens. Set the red where you want it to shut off.
I think on some systems at least one radiator should remain open to provide some circulation - maybe for the sake of the pump. This valve wouldn't have a TRV or the setting would be very high so it wouldn't ever close fully. Would that be why it's covered up? The tiny radiator would be a good choice as it would dissipate and waste least heat.
Other possibilities: The balancing valve on the radiator (on the other pipe) is closed or blocked. Try opening it up and if that doesn't work open and close it a few times and see if that fixes it. All the other radiators are in parallel and provide an easier return path for the water. You could test this theory by closing the hand valves on all the others ...
I feel a fool! I bleed my radiators & I let all the water out! I've been told open the values! But I can only get the ones upstairs open, also should the boiler be on?
Every bleeder. Some may not even be on radiators (depends on system layout/design - bleeder elbows are common, but more on baseboard than radiator type systems. If there is air trapped in a radiator, no water gets pumped through it. Circulator pumps are very limited devices. They don't do well at pushing air bubbles around the loop.
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