AliG Posted October 20, 2023 Share Posted October 20, 2023 I don't have a multimeter although I have been thinking of getting one Link to comment Share on other sites More sharing options...
AliG Posted October 20, 2023 Share Posted October 20, 2023 All fixed. You were right @ProDave I think when I originally connected the receiver, I hit the heating and hot water buttons and it fired up the boiler. But when I reconnected the original thermostat, the boiler did not fire up when just the heating was turned on, but it sounded like the heating was on as a pump fired up. At that point I noticed in the instructions reference to " gravity-fed and part pumped" systems. The systems is not gravity fed, but it said that with part pumped systems, switching on the heating operates a pump to divert water to the heating, but the hot water relay switches on the boiler. As I could hear a pump come on when I switched on the heating, I thought this might be the issue. I switched it into this mode and that fixed it. Link to comment Share on other sites More sharing options...
ProDave Posted October 20, 2023 Share Posted October 20, 2023 No two heating systems are identical. A problem that will be even worse when we all have heat pumps. 1 Link to comment Share on other sites More sharing options...
AliG Posted October 20, 2023 Share Posted October 20, 2023 Just posted pics of the renovation if anyone is interested. Link to comment Share on other sites More sharing options...
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