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    Alpha 280e Boiler Short Cycling

    Yeah they were recon bits. £60 for the plate exchange, £45 for the PCB and thermistors and so on are cheap. Just look on eBay. Right now someone is selling all three PCBs for £25. That's worth a punt. Ebay Alpha Boiler Parts Search Working perfectly now. PCB not doing the modulating. Replaced...
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    Alpha 280e Boiler Short Cycling

    Yes it's an old boiler. I've spent about £250 so far and the rest of it is in tip top condition. Why spend £3,500 (which is what I was quoted) for a replacement? I reckon to get another 5 to 10 years out of this boiler. I have all the parts to do any repairs and I'm now completely proficient at...
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    Alpha 280e Boiler Short Cycling

    This problem has been with this boiler for a while. The combustion chamber linings have all been replaced. Looks nice in there.
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    Alpha 280e Boiler Short Cycling

    And if I turn up the boiler termo to full blast, I get a water temp of up to 70 deg C but after 10 mins I get overheat cutout. Overheat temperature is about 80 deg C. Which I’m guessing is about right.
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    Alpha 280e Boiler Short Cycling

    That’s a good point. There are 2 small potentiometers on the PCB. One of them modulates the burner and the other one doesn’t seem to alter anything. I adjusted the burner one so that it modulates the boiler down to quite a small flame. With that and the control panel thermo to low (about 33%...
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    Alpha 280e Boiler Short Cycling

    Yes, another boiler short cycling thread! I have an Alpha 280e boiler. It gets the radiators up to temperature quickly. The radiator return pipe is hot, not as hot as the outflow but hot. After it's up to temperature, the boiler will fire for 30 seconds then cut off and go through its 3 minute...
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