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Hi All Long time since I've been back to these forums and I have looked around for the answers but as yet with no luck. I have just moved into a house with what I am assuming is a Y plan installation. It has a Honeywell 3-Port 40003916-003 valve, with Port B going to the Boiler, and Port A...

Hi. Had a strange problem with my hot water controller, when it reaches the required time to switch on, you hear an audible 'click', the red light comes on, then immediately it clicks off again. It continues to do this for the whole duration of the 'on' period. If you select Manual ON or +1HR it...

Hi All First post on here, hope someone on here can help! I had a problem with a central heating pump running on, which took a while to diagnose, and after replacing the old pump (just as well as it had been running non stop for about 3 weeks!), the fault was finally traced to a sticking...