- Joined
- 15 Dec 2020
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I’ve just had a new valiant boiler installed (sealed system). It faults (F23) a couple of times a day. Seems to be when the boiler fires up. The pump seems to be working ok in that all rads get hot in good time. It always runs fine after a single reset. Could it be that the pump isn’t working optimally? It’s maybe 4 years old. We did have a previous plumber who put a screwdriver in it and said it wasn’t resisting the screwdriver that hard but that seemed fairly unscientific! We have maybe 15 rads plus an underfloor heating circuit. I’m slightly at my wits end having paid quite a lot for a new boiler.