ghost fan..??

[primmers]

a friend of mine says her fan comes on all by its self..
the t-stat is one of those old round non-digital ones.
its set on auto, and the heat/cooling is in off.

but insists the fan comes on all by its self then shuts off..

can someone give me a clue?

[ct2]

how would you like the thermostat to work.? if it wont turn off then set the temp do that it will

[beenthere]

Where is the unit located.

Some attics get hot enough for the fan/limit switch to start the fan, and then shut it off when the sensor cools.

[primmers]

ct, the way the t-stat is set, fan on auto and cooling/heat on off, why would the fan come on??

been, it hasnt got hot enough here..the heater is in the garage..the ac unit is on the south wall..

[Senior Tech]

Bet it's a comfortmaker furnace...any takers?

[danj]

You may need a resistor between G and C to stop the ghost fan.

[primmers]

what size??

[beenthere]

Brand, and mod of furnace?

[Edmund Forsthe]

does the furnace have a camstat

[dec]

With that little of information.....who knows? Now as much as I made answering that question......the answer was worth about the same.

[primmers]

"i'll be bock"...

[dec]

Primmers.......Im just curious, Now at first I thought you were a homeowner trying to fix a friends furnace. Now I see that you are a tech, from looking at your other posts. Am I right?

[beenthere]

looks like he's a refer guy.