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That is pretty much impossible as that is AC and the furnace is DC powered. The only way that might happen is if somehow an AC line were shorted out in the process of installing the furance. Perhaps an AC lead pinched or a screw put into the wiring. Look for those things and then get back to me if more is needed. All follow ups are included in our fee.
Just checking back in to see if you were able to resolve this or do you still need some additional input from me here?