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Hi, I am a 'Gas Safe Registered' Engineer. The overheat stat was changed whilst checking it for continuity, as removing the spades pulled the old one in bits. The thermistor read between 10-12k ohms at ambient air temp whilst out of the dry pocket (which is a correct reading) but i suspected...

Hi. Im looking for advice on a Glow-Worm Micron 50FF which the boiler locks out with the reset light on. It appears to run problem free from resetting the control knob until it reaches temperature then locks out, illuminating the reset neon. I have changed the overheat stat and the thermistor...