I have a Baxi Genesis combi boiler.
Yesterday, I noticed that the pump was running all the time.
I played around with the settings and found that Hot water is fine, but no CH. My wife did briefly turn on the CH yesterday and it did come on.
If I select CH, the boiler will fire up but go off within 20 seconds or so. The pump continues to run.
I assume it is a sticky / duff microswitch in the 3 way valve and I need to get it replaced. Does that sound right?
As it is the weekend, and I would prefer to wait until Monday (plumbers are cheaper then), will it cause any problems or damage if the pump continues to run?
Obviously I don't need CH at this time of the year, so am just happy that we have hot water.
Steve......