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- 19 Dec 2019
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Hi I have had the same problem with my boiler since it was installed over 10 yrs ago, its the last of the Baxi back boilers which still works ok. I have 13 radiators all have TRV's apart from two, one towel rail and a very small rad near downstairs toilet. All the TRV's are adjusted down, the boiler reduces down but does not stop until the timer program runs out. The system also has a room stat linked to the boiler from the hall. If I try to control the temperature with the stat it works not bad around 21 degrees. It seems like anything higher or lower is a problem. Once the room stat is satisfied the boiler cuts along with the ch pump. The heat stays in the heat exchanger and can be heard still boiling after boiler is stopped. I do have a thermo valve fitted for expansion of hot water but it seems if the boiler fires agin within a few minutes it locks out on OH and trips. The boiler has no facility for pump overrun and read about true off timer delay switches (to keep the pump running for a minute or so after boiler has stopped) I have installed it but not 100% with the wiring, the pump runs consistently, I am sure I have the live in the wrong connection? The timer switch has L 1 2 N, does anyone have any experience of wiring these switches?
I am proper stressed out now!!
cheers Joe
I am proper stressed out now!!
cheers Joe