Amana AMSS920803BN Error Code 2 Flashes: Pressure Switch Stuck Closed
What Does Code 2 Flashes Mean?
Code 2 (2 Flashes) on the Amana AMSS920803BN means the pressure switch circuit is closed before the induced draft blower has started running. The pressure switch is a safety device that should only close when the inducer motor creates sufficient airflow to safely vent combustion gases. If the switch is already closed before the motor even turns on, the control module recognizes this as an unsafe condition and will not proceed with the ignition sequence.
The most likely cause is a pressure switch with contacts that have physically stuck together. Pressure switches are mechanical devices that open and close thousands of times over the life of the furnace, and eventually the contacts can weld or stick. When this happens, the control board cannot verify that the inducer is actually running and producing adequate draft.
A less common cause is a short circuit in the pressure switch wiring, which makes the control board think the switch is closed even when it is not. In either case, a technician needs to test the pressure switch circuit and replace the faulty component.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Pressure switch contacts stuck closed | Most common | ✗ Call a pro → |
| Short in pressure switch wiring | Uncommon | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- The furnace displays 2 flashes and will not start — the pressure switch needs professional testing and likely replacement
- The inducer motor is not running at all but the pressure switch circuit reads as closed
✓ Verified against manufacturer service manual — March 2026