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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22678
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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Carrier Infinity system fan is pulsing then stalling.

Customer Question

Hello, Carrier Infinity system fan is pulsing then stalling. getting change air filter. Filter changed with same issue
Submitted: 2 years ago.
Category: HVAC
Customer: replied 2 years ago.
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Customer: replied 2 years ago.
There are two air filters, One at the air return and one at the fan. Both changed. Fan runs fine for 3 minutes then starts pulsing.
Expert:  BillyHvac replied 2 years ago.
th9s is usually caused by a bad control module on the rear of the motor.
Unfortunately this requires a test with an ecm motor tester by a contractor.