Hot river works but middle heat doesn't?
I recently have new boiler replaced both crucial heating and hot dampen were fine on that morning but now, simply hot water works but radiators don't fry up at all.I am sure the thermostatic valve are on , so heat must flow.Any design please?
Answers: Could be that your change over spout is stuck on domestic. Also get the pump checked. But deliberate your problem is that the two or three (which ever you have fitted) spout is sticking on the domestic water and not switching over to the rads.
Two or three passageway valves are situated surrounded by your airing cupboard where the hot marine tank is and look resembling a silver box. Check to see if the switch on it is moving when the central heat tries to turn on. If not move it manually and see if the heating comes on. If it does, this is your problem.
try bleeding the radiators, nearby may be an air block somewhere contained by the system.
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