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View Full Version : Why won't my furnace turn on unless I physically flip the switch..


Rick1982
Nov 26, 2010, 07:57 AM
I replaced my thermastat (aprilaire) with a LUX TX1500E. The furnace will not turn on unless I physically flip the switch.. It worked fine last night, however, this morning the furnace will not turn on.

ballengerb1
Nov 26, 2010, 08:30 AM
It is most likely a mismatch with your wires to the stat. What type of furnace do you have and what are the colors of all the wires coming out of the wall?