YP9C - Noisy Blower (Heating)

York Gas Furnace: YP9C

Re: Noisy Blower (Heating)

The YP9C gas furnace has a modulating gas valve, variable speed inducer and variable speed blower motor.

CHECKOUT:

1. Check Blower Operation

• In the heating mode, the blower speed is controlled by the Discharge Air Temperature.
  • As the burner firing rate increases, the blower speed increases to maintain a constant discharge air temperature.

2. Check Air Filter

• A clogged air filter may cause the blower motor to over-ramp in an attempt to keep the discharge air temperature down.