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• Gas Work
• Bromley
• Posted 27th Mar 2015

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I have Potterton Powermax HE and it locks out with an error code A01 - burner can'not start. Would like for someone familiar with this type of boiler to come round ideally today.

Possible explanation I found: User realises the boiler has stopped working and it has locked out showing the A01 error message. Pressing the reset button makes it start apparently normally but the cycle repeats an hour, a day or a week later. No technician called to attend can ever find anything wrong. Unfortunately I've yet to encounter this problem personally on a Powermax HE so I have no experience of how to fix it but I DO however get this exact problem from time to time on my Keston C25! I'm reasonably certain both boilers use the same gas valve. The settings on my Keston gas valve tend to drift out of adjustment over time, so the first thing I'd try on a Powermax HE with this problem would be to check the combustion settings using a combustion gas analyser and adjust if necessary. The Powermax HE manual also suggests cleaning/replacing the ionisation probe and lead.