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Hi all, just for closure I cut link one and now all is working exactly as it should. Thanks

Just read on the honeywell wiring centre pdf that if a 2 chanel programmer is used make sure terminal 1 is cut, it currently is not and a 2 channel programmer is being used. Could this be causing all the issue?

Thanks for the reply, does my description help narrow down the wiring issue?

Had another tread which described other issues. However I have now condensed the issues into one strange one, which I can't find any other examples of online! Essentially with the heating on and hot water off if the hot water cylinder thermostat is turned up the heating will stay on full power...

Hi, one more evening spent and getting closer hopefully! I have now compounded the issue where if the hot water is set to off and the cylinder thermostat turned right down the heating will work exactly as it should. However witj the cylinder thermostat up at 60*c this will cause the heating to...

Hi everyone. I have done some more investigating tonight. And the 3 port valve is moving to all 3 positions as it should. However it is doing so with only the hot water turned on. That is to say with the heating set to off at the control panel but the hot water on the three port valve will act...

Hi all, Recently had boiler fixed, new fan, in our new house. Tonight I noticed it was very hot even with thermostat down low, checked and the boiler was still on. This is with the heating set to on but hot water off. I then went up to the hot water tank and turned the tank stat down to...

Morning Have read lots of posts but can't find one that's exactly my situation. Essentially in my en-suite where we are replacing the shower cubicle 2 of the 3 walls are blockwork rendered then skimmed and one wal is plasterboard. When getting the tiles off the backing thistle plaster has...

Very true, scary to think this was installed as part of a council scheme to keep the elderly warm...

Hi thanks for all your help. Going to call it a day I think as it is starting to get beyond my abilities. Very frustrating as the install was carried out in 2011 by a gas safe engineer so has clearly been working so not sure how the wiring is so dodgy! Really get the feeling it's going to be a...

Okay so trying it again the heating settings have no effect however once the hot water is turned on by itself and thermostat up the pump kicks in and after a few seconds the boiler has the fast flashing blue light and the pump continues to run constantly.

Just did this test and there was 135-140v on the white and orange and still the 240v on the grey.

Thank you just as I tried to do that as I turned the boiler back on the pump kicked in. However the boiler had a fast flashing blue light and didn't ignite while the pump kept going. Tried to reset the boiler by holding it on the reset position for 5 seconds to no avail so turned it all off and...

Photo of the airing cupboard incase I am missing something obvious!

And when the hot water is off the cyl stat is still live but switched live to boiler is off. Finally there's no power from the honeywell relay (from the wireless thermostat) even when on, is this usual? Many thanks Rob

Just done this test summary as below: With heating on and water off orange wire isn't live only the blue one is. Switched live on boiler is also off. With water on and heating off cyl stat brown cable is live and switched live on boiler is also on (at 35-40v) Any ideas?

Just reading the manual for the boiler and one of the suggestions is to check the manual bypass valve is open, where is this and what would it look like? Bit of googling keeps coming up with automatic bypass being fitted now?

Thanks for all the replies. I'll check tonight to see if all the switched lives are working as they should. If they are that basically only leaves the boiler circuitry and the pump wiring?

Hi see below:

Yes it is a wireless receiver as I had someone turn the room stat downstairs the light turned on and off and could hear a clicking noise which sounded like a relay.