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I have an Alpha CB28 combination boiler and it is not working at all. The bottom neon indicator light is flashing every second and the helpline suggests it is a temperature sensor fault. I have had it replaced and it still does not work. It did work for a short time last night when the new part was fitted but today it has not worked. The boiler appears to fire up for a few seconds and then it clicks off again, so the light is only staying on for a short time.

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  • Anonymous Jan 17, 2009

    , i have the same problem, as chris412

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Try tapping the 3 relays on the pcb,"thats the circuit board under the front cover...
it sounds like a dodgy relay thats starts up the pressure fan in next to the flue....
maybe a dry solder joint,maybe a new relay needed....
its a common fault on this model..

Posted on Aug 02, 2009

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