New furnaces will produce smoke for a while the first time. Your dealer may not have done a proper PDI. I have ran furnaces for 1/2 hr or more to clear up the smoke.
I would shut it off. Let it set for 1/2 hr and then try again. If it creates another heavy smoke cloud, it needs to go back for warranty service. It can take a few cycles to clear all the oils.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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