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Discussion Starter · #1 ·
There is large noise from the furnace, basically two types, one is sharp noise last for a short awhile and happened time by time, this I think from induce motor. another kind noise is not that sharp but very loudly and continued for a quite long time from the top somewhere, I'd guess it is from blower motor, but the top location annoyance me, need help please.
Best
Adam
 

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Just turn the fan on or a/c and see if there are any bad noises. a/c is a better test, runs at a higher speed than continuous fan.

The main blower is in the lower compartment assuming the furnace is an upflow. The inducer is in the upper compartment.

The inducer should a long time, it should have to be replaced only once over the 20 +/- year life of the furnace.
 

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Yes, that noise is characteristic of the high speed ball bearing faillure on inducer motors. I think yours is a variable speed 3 phase motor. I think the equivalent part is a Fasco A197. Verify it yourself before ordering. Link below may be helpful:

Inducer Fasco A197

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Fasco brand will be less $$.
Double check the wiring, they should match. If not, check the diagram on the Fasco.
Also be aware that electrical motors are non returnable - ask before you buy, so better take the old blower to a supply house for a better matching.
 

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Discussion Starter · #11 ·
Just turn the fan on or a/c and see if there are any bad noises. a/c is a better test, runs at a higher speed than continuous fan.

The main blower is in the lower compartment assuming the furnace is an upflow. The inducer is in the upper compartment.

The inducer should a long time, it should have to be replaced only once over the 20 +/- year life of the furnace.
Thanks,
you are right, on cooling model, the noise is much less. I'll change the inducer later.
Best
 
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