I have a problem with my boiler. HW is fine but when it comes to the CH the boiler fires up, Pump runs (which has been replaced) and everything looks ok for about 45-60 seconds. Then the flames die down in the boiler. The lockout light does not illuminate. The room thermostat is calling for heat.
I have checked the CH temp sensor and its around 13 - 14 Kohms which is the same as DHW. When I checked the C.H. Limit Thermostat there was no resistance at all when cold. I would of thought there should be some resistance? Any ideas would be great before I order a new limit theromosat and waste 40 quid!!
I have checked the CH temp sensor and its around 13 - 14 Kohms which is the same as DHW. When I checked the C.H. Limit Thermostat there was no resistance at all when cold. I would of thought there should be some resistance? Any ideas would be great before I order a new limit theromosat and waste 40 quid!!