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- 2 May 2018
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The fan relay in my EuroCombi Airston A23 went recently (quite violently too). I've replaced the power PCB (this boiler has 2). Now when hot water is requested or the heating turned on, the water pump will turn on but nothing else. This doesn't seem to be a problem with the new PCB as using a multimeter shows the control board isn't providing power to the fan relay.
The main circuit flow switch appears to be working correctly, and manually triggering the overheat thermostat does cause a fault. I can't find a fault anywhere, but all that is happening is the pump turns on and nothing else.
The main circuit flow switch appears to be working correctly, and manually triggering the overheat thermostat does cause a fault. I can't find a fault anywhere, but all that is happening is the pump turns on and nothing else.
