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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a Trane XE90 and fan stopped running. We have it on

Customer Question

I have a Trane XE90 and fan stopped running. We have it on all of the time, mostly. There is no light blinking on the board of the furnace. The digital thermostat is still on, though, while the door button is pushed in.
JA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?
Customer: Larger
JA: Do you plan on doing the work yourself?
Customer: Probably
JA: Anything else we should know to help you best?
Customer: The run capacitor for the fan has been newly replaced.
Submitted: 6 months ago.
Category: HVAC
Expert:  HVAC Guru replied 6 months ago.

Hello, one minute while I get some information together.

Expert:  HVAC Guru replied 6 months ago.

Can you try to jumper the R to the G thermostat connections at the board in the unit to see if the blower runs?

Customer: replied 6 months ago.
Ok. Gimme a min.
Expert:  HVAC Guru replied 6 months ago.

ok no problem just make sure you have the safety switch depressed hen you have the panel off.

Customer: replied 6 months ago.
Put the 2 wires together. Nothing.
Customer: replied 6 months ago.
There is some buzzing when I move any of the wire bundles to access really anything.
Customer: replied 6 months ago.
Safety switch is taped down, btw.
Expert:  HVAC Guru replied 6 months ago.

You have to jumper out the connections on the board not the wires

Customer: replied 6 months ago.
My apologies. I'm in the middle of 3 other projects right now. I know better. 1 sec.
Customer: replied 6 months ago.
Nothing. No change.
Expert:  HVAC Guru replied 6 months ago.

OK does anything light up on the board?

Customer: replied 6 months ago.
No board lights.
Expert:  HVAC Guru replied 6 months ago.

OK check the fuse on the board. There should be a slot fuse on the board.

Customer: replied 6 months ago.
The fuse checks out. It is ok.
Expert:  HVAC Guru replied 6 months ago.

OK then check for power to the unit either you lost power to the unit or possibly the board is bad.

Customer: replied 6 months ago.
I'm getting 120V and 24V at the transformer. Power is on, power is flowing.
Expert:  HVAC Guru replied 6 months ago.

Do you have 24 volts at the board if so do you have a condensate pump?

Customer: replied 6 months ago.
24 V on the board. No condensate pump as far as I know. We have recently moved in and this is the first I've had to mess with this HVAC.
Customer: replied 6 months ago.
Could you tell me where it would be connected or what it mat look like? My old HVAC did not have one.
Expert:  HVAC Guru replied 5 months ago.

Follow the drain line from the AC coil on the furnace it would go to the pump if you have one

Customer: replied 5 months ago.
No pump so it looks. I replaced the board and the fan kicked on right away. I'm getting 6 blinks on the LED and the heat won't turn on.

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