Potterton Promax SL not firing up on Auto

Discussion in 'Plumbing and Central Heating' started by stang267, 27 Mar 2021.

  1. stang267


    27 Mar 2021
    Thanks Received:
    United Kingdom
    Make: Potterton Promax SL

    For the past 3 days, I've noticed that my boiler does not start the ignition sequence when calling for HW/CH anymore, there is no whirring sound. I have to press the Reset button for it to begin the sequence and fire up.

    I took the casing off just to have a look at the light indicators. Left light flashes red. No light on middle light and On is solid green
    (Picture): https://imgur.com/f0wedWy

    Is there any troubleshooting advice before calling an engineer?
    Last edited: 27 Mar 2021
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