We turned the thermostat up as far as it would go, turned on the furnace, took the battery out of the smoke detector, turned on the exhaust fans, and left for an hour or so. When you return turn off the furnace, replace the detector batteries, and open the windows. That should burn off the furnace and eliminate the problem.
2014 Eagle Premier 361REQS
2013 Ford F350 Crew w/ 6.7 diesel