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I have a Vaillant ecoTEC plus 837. The control panel is quite different to the on line manuals. There is one Contol panel window and 2 sets of +/- buttons below. There is also a small button displaying a flame. The power is on (can hear fan) but NOTHING on the control button.....and NO heating!
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Can anyone enlighten/ help me? Submitted on 10-2-2022 at 19:03