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Loud furnace -- Inducer Valve or Motor Bad?

4K views 2 replies 3 participants last post by  G71 
#1 ·
Hi folks,

Got a 20 year old Trane XL90 furnace which is having issues. The exact moment it goes on, a very loud humming/grinding noise comes on. It gets a bit softer after the first 10 to 20 seconds of being on, but its still loud enough to hear from the next floor up.

I know for a fact its coming from the inducer valve and inducer motor region but I'm having a hard time determining which one is the culprit. Trying to save some $$$ here to replace either the valve or the motor, if thats possible.

Many thanks,
buhockey21
 
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