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How do you test the APS? He has put a new one in and still no joy. Even if it would be the APS the question remains - Why is the fan running all the time? As stated, it doesn't even stop when the boiler is switched off from it's control panel - only if the power supply is off or if...

That's what the engineer who came in to have a look said. He will bring a PCB in tomorrow. many thanks, Radu

Hi, i have a this problem with a Betacom 30c: The fan starts as soon as rthe boiler is switched on, from power supply, and runns continously. It doesn't work on hot water or heating. Even if the control switch is turned to 0 the fan doesn't stop. The front panel shows a fault on the Air...