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Discussion Starter #1
The fan motor only works when the cover panel is removed... not sure what the issue is. The motor sounds weak when it starts up, could it possibly be a relay? I honestly have no idea. It's a 1985 TRANE model. I would appreciate any input. thank you
 

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With the limited data you offer I will guess maybe a bad capacitor?
 

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Relay probably wouldn't work with the panel off any better then it would with the panel on.

Check capacitor as said above.
 

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Discussion Starter #4
changed the capacitor, still having the same issues... When i remove the cover that accesses the fan and then turn on the air handler it works. So then i replace the cover and it continues to work until the next time the air handler kicks on and tries to heat the upstairs... it sounds like a noise is coming from the fan motor area... it's an annoying buzzing/humming sound with some crackling noises.... do i need to change the fan motor?
 

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Sounds like a wire is being moved or pinched when you close the panel.
 

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Burned contacts on an old relay can give good and bad connections intermittently. Plus you may also want to rule out contact with wiring or blower when closing the unit.
 
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