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Ariston eurocombi boiler not firing up. Thermostat lights all on upto 80 degrees as if overheating. Pressure fine. No fan, no ignition.

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  • Anonymous May 03, 2009

    I have the same problem pump is working but fan or fame not working. have you found a solution?

  • michaelcox12 May 04, 2009

    I have the same problem. I think it is the temperature probe. I have ordered a new one. When I fit it I will let you know if it resolves the problem.

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The fault occured a few days after I altered the radiator layout and then refilled the system. Intially the boiler worked fine, then a few days later all of the temperature lights light upto 80 and the boiler would not fire. The pump was working but the fan was not. After diagnosing the electronics I came to the conclusion it was either the contol pcb or the temperature probe. As the temperature probe was the cheaper option I replaced that first. The system is now working again. I think this fault was caused by me failing to completly remove all air from the system after refill and an air lock occuring causing the probe to burn out.

Posted on May 07, 2009

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