The water and radiators are only getting luke warm, but the boiler is cycling on and off, what can be the cause of this?
This is most likely the Flue Fan. Sometimes these can work for a short while, then the thermal cut-out in the fan motor operates prematurely, causing it to stop. Sometimes the bearings become partially siezed up, causing insufficient air flow. The air-vane sensor switch (or APS) in the duct will detect this and the electronic safety circuits will just close the gas-valve for a time. However,There are other more technical reasons for a boiler short cycling like this, outside the scope of this FAQ. The fan-motor IS a part that you can replace yourself, but it will cost around 100, and since it is such a major safety item, it is best left to professional Corgi engineers. Ensure that you replace the sealing gasket that should come with the new motor (it sits between the main motor body, and the duct case). If yours is covered on insurance, then obviously do not touch it, just call out your registered Corgi specialist. Use THIS LINK to find yours. NOTE Many fan issisted flue boilers operate
