That red LED in the fuse box only illuminates when something tries to pull load and the fuse has blown. The load likely is something with your inop furnace. The fuse is toast, pull it out, check it with a VOM if you want, and replace it.
If you have one of the new self resetting fuses for the furnace that others her have written about, they seem to fail often. I believe you can replace it with a dastard fuse.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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