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Have Carrier fan coil unit model FV4CNB003. Have Carrier Fan…

Customer Question
Have Carrier fan coil...

Have Carrier fan coil unit model FV4CNB003.

Contractor's Assistant: Did you double-check the thermostat? And what about the unit's filters?

Have Carrier Fan Coil unit # FV4CNB003. Seemed to run and change speed during operation. Is this normal?

Contractor's Assistant: Do you plan on doing the work yourself?

Still don't know if anything wrong with unit.

Contractor's Assistant: Anything else we should know to help you best?

Is it normal for unit to change speed during operation?

Submitted: 7 months ago.Category: HVAC
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Answered in 14 minutes by:
12/11/2017
HVAC Technician: airheatman, HVAC Technician replied 7 months ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,193
Experience: Furnace, A/C and heat pump specialist.
Verified

Yes it is absolutely normal.This air handler has what is called a variable speed motor which will ramp up and doewn during operation based on temp and humidity demand.

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