Hi - hope someone can give me a pointer or two. I have a conventional open vented heating system with a cylinder, pump, air separator and 3 port valve in the airing cupboard and conventional boiler in the kitchen.
Suddenly the heating, which has been working, isn't. The hot water still is working. There is just no call for heat at the boiler as the red light is on steady. The thermostat, which is only a month old is up high (and as I say has been working OK). The pump is OK. Controller seems OK too. Have bled rads, not much air in them.
My guesses are - thermostat or other wiring problem, port valve problem (although the lever seems to move as it should).
Any other theories or things a plumbing novice can try?
many thanks
Rob
Suddenly the heating, which has been working, isn't. The hot water still is working. There is just no call for heat at the boiler as the red light is on steady. The thermostat, which is only a month old is up high (and as I say has been working OK). The pump is OK. Controller seems OK too. Have bled rads, not much air in them.
My guesses are - thermostat or other wiring problem, port valve problem (although the lever seems to move as it should).
Any other theories or things a plumbing novice can try?
many thanks
Rob