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.
| Qty |
Possible Causes: |
|
Bad Blower Motor |
|
Bad Blower Wheel |
| 1 |
Clogged Air Filter |
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.