Gas and Oil Home Heating Furnaces - blower ona gas furnaces

:wall: OK here is what happens I have my thermostat sat on 69 the heat will kick on and burn and kick off then the blower may kick on after a few min
I have a Honeywell limit switch on the furnaces

:wall: OK here is what happens I have my thermostat sat on 69 the heat will kick on and burn and kick off then the blower may kick on after a few min
I have a Honeywell limit switch on the furnaces

Sounds like the anticiptor on your T-Stat isn't set right. It's causing the stat to become satisfied too soon, before the blower energizes. When that happens, the gas valve is de-energized but the blower still finishes it's cycle.
Phil

Have you checked the fan limit switch there. Some have a switch that you can turn on the blower, try it or jump fan switch and see if blower will keep running. what is blower control set at how high? Filter clean, AC coil if you have one clean?

ED ;)

I have a switch ED that turns on the fan but when the furnaces goes through a cycle and cuts off the blower don't kick on

Does the furnace have a control board in it? That can be bad. If the motor runs ok when you just turn it on. Or is one of the speeds gone on the blower motor?


ED ;)

It has a box on it that says limit box on it it has two micro switchs in it no board just the box

OK I turned my thermostat all the way up and the blower kicks on any suggestions buy a new thermostat ?