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BFL13's avatar
BFL13
Explorer II
Oct 18, 2021

8531 /Burner Issue UPDATE--Photos ( Fixed!)

With the furnace running, where do you put the pos and neg leads of the meter? Or can you do it at the Tstat inside with the furnace on?

I want the 12v to the board, not the voltages the board puts out to the various components. eg,I got 10.67 at the gizmo on the right of the fan casing and some metal nearby, but I don't know if that is the loaded 12v with the furnace running or what.

Thanks

  • enblethen's avatar
    enblethen
    Nomad
    Oct 18, 2021
    Different places.
    Easiest from your photo, is from either side of the circuit breaker to ground. Metal housing should work.
    Better place is on left side not shown in photo, is incoming power. Not the blue wires as they are thermostat leads. Should be red and yellow leads.
    See page 9 figure 6
    manual

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