I have a gas furnace. When I woke up this morning it was about 80F in the
house, even though the thermostat was set at 68F. After turning the
thermostat all the way down the heat was still blasting and I had to shut
the gas valve on the furnace to shut the thing down. Before I call & heating
& ventilation specialist and pay big bucks, might there be a way to
troubleshoot this on my own? I'm wondering whether I simply need a new
thermostat and, if so, whether I could check this and install it on my own.
Any help would be greatly appreciated.
W.D. (aka, sweating in Wisconsin)
ps -- the temp hasn't been abnormally cold -- in the 20s