Vokera Combi Compact turns heating itself

Hi,

I have a Vokera Combi boiler Compact that is 7 years old, and it went crazy last two weeks. By crazy I mean it switches itself on and off when it wants. We had it pre-programmed/ set up to start heating at 4 p.m everyday and finish at 5 a.m and it should produce 20  degrees, but what is happening now is anything just not that. Radiators are warm at 11 a.m and cold at 9 p.m. Any idea what has happened here?

Lewis

Hi Lewis

If your radiators are heating up, not only boilers start to work it will be the thermistor issue, and it will need to be replaced. Normally thermistor is connected with the ani-frost thermostat and both calibration should be incorporated. After replacing both thermistor and thermostat will need to be re-calibrated.