DIY Doctor

Boiler Developed Fault Won't Fire When CH Only set

Postby George999 » Wed Dec 11, 2019 9:09 pm

Advice
Boiler has developed fault wont fire up when CH only set fire up for few seconds then red light comes on. If i reset run hot tap it fires up if I then switch on central heating it stays lit turn tap off and it still stays lit. will just not fire up by switching central heating on first.
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Postby ericmark » Thu Dec 12, 2019 9:45 am

Unlikely any one on hear can help, I don't know boilers well enough, however you would need to give make and model of boiler, system used Y-Plan etc, and fuel used oil or gas to have a chance.

If you had not said red light, I would have guessed at faulty three port valve, and would have suggested moving the bleed level and latching as a temp fix, but that fault should not have lit a red light.
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