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The squirrel cage started making horrible grinding sounds.

Customer Question
It was suggested that some...
The squirrel cage started making horrible grinding sounds. It was suggested that some screws need to be adjusted.
Submitted: 2 years ago.Category: HVAC
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Answered in 1 minute by:
1/25/2016
HVAC Technician: Rick, HVAC Supervisor replied 2 years ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 24,017
Experience: 40+ yrs. experience as a licensed oil & gas technician.
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What squirrel cage? on your furnace blower?

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Customer reply replied 2 years ago
on the furnace blower of our Trane XL 90
HVAC Technician: Rick, HVAC Supervisor replied 2 years ago

It's possible that the set screw that secures the squirrel cage to the motor shaft has come loose. When that happens the cage can slip out of position and grind on adjacent surfaces. You need to remove the blower and re position the cage so it doesn't rub against anything and spins freely. It's also possible the bearings are gone (much less likely) and you need a new blower.

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Phil
Phil, Mechanical Engineer
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