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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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We have a 4 ton heat pump runs about 20 minutes or so

Customer Question

We have a 4 ton heat pump runs about 20 minutes or so and then the air handler (fan) continues to run but then makes a surging sound, kind of an instant power on and off sound.
Submitted: 5 months ago.
Category: HVAC
Expert:  BillyHvac replied 5 months ago.
Hello, My name is ***** ***** know if your motor is a variable speed?..or do you have the moel number of the air handler?
Customer: replied 5 months ago.
it is not a variable speed is single speed.
Expert:  BillyHvac replied 5 months ago.
I am not currently configured for phone contact so I will opt to a tech who is. Billy
Customer: replied 5 months ago.
The sound of the fan when on AC mode (cooling mode) makes a surging sound, but when it is fan only mode it works (sounds) fine....does not make the surging mode.

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