I've got an intermittent cut out on a VCW240H - the pilot and main burner both go out randomly, though more often when the boiler is fired up from cold.
The boiler has just recently been put back into service after 6 months off, so I've serviced it including flue check, burner cleaned, gas rate etc, replaced the thermocouple (including the in-line interrupter thermostat), spark electrode, pilot injector and pilot gas supply pipes from the gas valve to the pilot injector and from the injector to the pilot burner.
Although the boiler will fire from cold on the lowest temperature setting (1) it won't cycle if left on this setting and similarly if you start it above setting 5 and then turn it down to 1 it won't cycle.
When the boiler is running I'm getting no voltage through the overheat thermostat which I understand is correct, but 11v through the DHW stat which seems odd, though if I turn on a hot tap the boiler fires immediately.
My first thought is a faulty thermostat regulator PCB - I understand there are two PCBs on this particular boiler.
Help!
The boiler has just recently been put back into service after 6 months off, so I've serviced it including flue check, burner cleaned, gas rate etc, replaced the thermocouple (including the in-line interrupter thermostat), spark electrode, pilot injector and pilot gas supply pipes from the gas valve to the pilot injector and from the injector to the pilot burner.
Although the boiler will fire from cold on the lowest temperature setting (1) it won't cycle if left on this setting and similarly if you start it above setting 5 and then turn it down to 1 it won't cycle.
When the boiler is running I'm getting no voltage through the overheat thermostat which I understand is correct, but 11v through the DHW stat which seems odd, though if I turn on a hot tap the boiler fires immediately.
My first thought is a faulty thermostat regulator PCB - I understand there are two PCBs on this particular boiler.
Help!