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My boiler is 8 years old. For as many years as i can remember it has had a lockout problem intermitantly. I had a new board after one episode. Now it doing it again. It appears to stem from the air pressure switch. When it is fixed to its holding plate in a vertical position the boiler goes to...

Just replaced the trvs on possibly future son in laws house today. Turned it all off and pump continued to run, and not stop. He says it has always done that. Its a british gas programmer, made by invensys, model UP2. 2 ports, wiring centre,glowworm micron 40ff,system. Strange thing it , it is...

My frigidaire R1581 has stopped working. Its 14 years old . How can i test the thermostat. Is it possible to get a thermostat reasonably priced, or should i throw it away and replace it completely.

Probably old issue, but i am about to put TRVs on some rads and note they are reversable. Is it best practice to put them on the flow or return side of a radiator. I note on here that some say that if they are on the return side it can result in a bit of noise when they close. What is best@

I am soon to modernise an S plan heating system. I plan to add thermostatic valves to most radiaters, excepting those in lounge that are controlled by the room stat. I assume i will also need to put in a auto bypass valve. Immediately after the pump is the T where the CH and HW pipes part...