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jwedell · 10-20-2012, 11:29 AM

First use a known good thermometer and varify that the thermostat reading is accurate. Second turn up the thermastat to 74 and see if it heats up to 70. I don't think the problem is in the furnace, probably still the thermostat. Good luck.

10-20-2012, 11:29 AM	#3
jwedell Montana Fan Join Date: Oct 2006 Location: East Moriches Posts: 418 M.O.C. #6436	First use a known good thermometer and varify that the thermostat reading is accurate. Second turn up the thermastat to 74 and see if it heats up to 70. I don't think the problem is in the furnace, probably still the thermostat. Good luck.