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    Potterton Promax 15/2 HE Plus - Boiler locks out after 15 minutes.

    Hi All, I’ve had an issue with my boiler for several months now, as it’s getting colder now I would rather have this issue now fixed. (I’ve had 3 gas engineers out so far) So the problem is that the boiler locks out after approx 12-15 minutes, whether it’s for central heating or for hot water...