My boiler continues to fire up when the external control panel has shut off. It fires up then goes off when it reaches the internal thermostat setting. On the external controller no demand lights are on. Please advise.
Glow.worm 60ff boiler problem
May 20, 2017
2 Replies
I'd start by putting a multimeter on the call for heat line to the boiler, then you'll know where to look for the fault.
NT
Is there a frost stat somewhere?
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