Inducer motor won't start after recycling power

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Old 12-15-19, 11:35 AM
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Inducer motor won't start after recycling power

I have a 5-year old Carrier 58STA gas furnace, the inducer motor fan was making noise at the end of the cycle. I found out the problem was a worn out grommets on the motor assembly. Ordered a replacement, changed it out and took care of the issue. After letting the furnace running for a while, I wanted to check the screws. I cut the power, did a quick check and turned the power back on within a minute. For whatever reason, the inducer fan wouldn't run. The burner was lighted as normal, the circuit board warning light started to flash. So, I cut the power again, checked all wire connection, nothing was loose. When I turned the power back on this time, everything run normal. I did a few tests afterward. The inducer fan just wouldn't run after a quick power recycling. I have to wait 5 minutes or so and it will be fine. Any idea why? Thanks!
 
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Old 12-15-19, 12:28 PM
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a worn out grommet on the motor assembly.
Not sure I have any idea what that is.
I've never changed motor grommets before.
Is this a grommet on one of the mounting bolts ?

If you have a problem with the motor starting you need to verify whether it's getting stuck or there is an electrical problem.
 
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Old 12-15-19, 12:45 PM
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The burner isn’t able to fire without the inducer motor running.
Do you mean you worked on the blower motor?
If the inducer is off but the burner still tries to light you have major safety issues going on.
 
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Old 12-15-19, 01:53 PM
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There are 3 of grommets on the assembly. They are used as a washer/spacer for the screws holding the motor:

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They have worn out to the point the motor became loose and the fan wheel was grinding the housing. These are the actual grommets I took out from my furnace:

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If the inducer is off but the burner still tries to light you have major safety issues going on.
I may be mistaken the LED warning light with the burner turning on. Anyway, is there a cap or something preventing the draft inducer motor to run right after quick power recycle?
 
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Old 12-15-19, 02:19 PM
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There isn’t a capacitor on that motor.
Test the motor for proper voltage when it’s failing to run.
 
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