Furnace problems, any ideas?

[bctbct]

I have a 5 y.o furnace unit. Forced air Tappan brand.

I hear the fan that clears the heat exchanger, then the burner lights for about 2 seconds. It then kicks off, the blower then blows cold air. About a min or two later burner lights again and then shuts off.

I think it may still be under some type of warrantee but would like to have some idea what may be causing this. Thanks

 

[drnickriviera]

probably a limit switch. Open the cover for the blower motor. There is usually a circuit board down there. See if there are any blinking lights on it.

 

[imported_weadjust]

http://www.homerepairforum.com/forum/hv...-shuts-off-after-10-sec.html#post18473

http://en.allexperts.com/q/Heating-Air-Conditioning-696/furnace-cycling.htm

 

[Midlander]

I had a similar problem with a furnace once. Had to replace a whole circuit board.

Edit: I'd try the suggestions in weadjust's post. They make a lot of sense. :beer:

 

[MikeyIs4Dcats]

check your filter...a dirty filter can cause the fan to run without the heat exchanger

 

[her209]

A mouse is the culprit!

 

[bctbct]

Thanks guys, sanded the flame detector and now it works!

 

[imported_weadjust]

E-mail me a beer.

 

[bctbct]

Originally posted by: weadjust
E-mail me a beer.

:thumbsup: Just sent it, dont spill it on your keyboard