Chronological Sequence of Events 1.Programmable Thermostat installed in 2007, and was working as programmed 2.New Brock Furnace installed in April of 2009. 3.Furnace has run randomly as if it has a mind of its own, since the installation 4.Sometimes the air is heated and sometimes not...

I have a trane 5000 unit that operates well, however, on the walll switch, you cannot turn of the fan and it runs if the unit is on whether on off or auto position. I have to turn off fan at awitch inside home.

I have a gas furnace in our home. Recently the furnace gas preheats and the fan comes on but only will run for 30 seconds, when the gas reignites the fan turns off. I changed the filter but that made no difference. I looked at the fuses and while looking discovered the that the hot and common wire...

I have a 10 year old Lennox conservator II forced hot air gas furnace, the furnace itself runs good and produces heat , the problem I have is that the furnace cycle never ends it turns on produces heat then the firing stops the fan continues to run it cools down then before the fan cycle stops...

The other morning I came into the house and noticed the ac was not working. I turned off the breaker to the unit for a few minutes. Then turned it back on. Went to the thermostat pushed it over to auto and the fan came on but ran very slow. I them turned it off. Then turn on the heat, the fan...