XL80 Trane Furnace Fan won't turn on

jenlou · 01-26-2012, 03:13 PM

I have an XL80 Trane Furance. The thermostat calls for heat, the draft fan starts, furnace ignites, but fan doesn't turn on. Replaced the upper limit switch, and control module, and still have the problem. Eventually the upper limit switch shuts everything down when too hot. Let it cool, turn the fan on constant and furnace fires and heats as it would nromally. HELP

harleyrider · 01-26-2012, 03:59 PM

is there 120 vac going to the motor.....what is the UF reading on the capacitor?

hvac5646 · 01-26-2012, 05:02 PM

u gotta counterflo furnace. Your motor is probably shot..might be a capacitor too.

When was the last time u changed the filter.

how · 01-26-2012, 05:56 PM

hey HVAC5646
If his fan is OK switched to constant run, are you thinking that the lower heating speed windings are the problem? Capacitor choice confuses me if the cooling speed is fine.
I think I'd be first looking if the heating blower connection on the board is getting power as Harley suggested.

hvac5646 · 01-26-2012, 06:59 PM

Quote:

Originally Posted by how

hey HVAC5646
If his fan is OK switched to constant run, are you thinking that the lower heating speed windings are the problem? Capacitor choice confuses me if the cooling speed is fine.
I think I'd be first looking if the heating blower connection on the board is getting power as Harley suggested.

Yeah i'd agree with that (since I missed the part of the OP trying the Fan ON position) .

01-26-2012, 03:13 PM	#1
jenlou Newbie Join Date: Jan 2012 Posts: 1	XL80 Trane Furnace Fan won't turn on I have an XL80 Trane Furance. The thermostat calls for heat, the draft fan starts, furnace ignites, but fan doesn't turn on. Replaced the upper limit switch, and control module, and still have the problem. Eventually the upper limit switch shuts everything down when too hot. Let it cool, turn the fan on constant and furnace fires and heats as it would nromally. HELP

01-26-2012, 03:59 PM	#2
harleyrider Member Join Date: Feb 2007 Location: NW Ohio Posts: 804	XL80 Trane Furnace Fan won't turn on is there 120 vac going to the motor.....what is the UF reading on the capacitor?

01-26-2012, 05:02 PM	#3
hvac5646 Part of the Clover Leaf Join Date: May 2011 Location: NW Burbs of Detroit Mi. Posts: 1,047	XL80 Trane Furnace Fan won't turn on u gotta counterflo furnace. Your motor is probably shot..might be a capacitor too. When was the last time u changed the filter.

01-26-2012, 05:56 PM	#4
how Member Join Date: Feb 2011 Location: Vancouver BC Posts: 1,416	XL80 Trane Furnace Fan won't turn on hey HVAC5646 If his fan is OK switched to constant run, are you thinking that the lower heating speed windings are the problem? Capacitor choice confuses me if the cooling speed is fine. I think I'd be first looking if the heating blower connection on the board is getting power as Harley suggested. Last edited by how; 01-26-2012 at 05:58 PM.

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XL80 Trane Furnace Fan won't turn on