Amana AMVM970803BN Error Code EE1: Low Stage Pressure Switch Closed at Start
What Does Code EE1 Mean?
Error code EE1 on the Amana AMVM970803BN means the low stage pressure switch circuit is already in the closed (activated) state at the beginning of a heating cycle, before the induced draft blower has even started. Under normal operation, the pressure switch should be open at startup and only close once the draft blower creates sufficient negative pressure. Finding it closed at startup tells the control module something is wrong.
This fault indicates one of two conditions: the pressure switch contacts are physically stuck in the closed position due to mechanical failure, or there is a short circuit somewhere in the pressure switch wiring that is creating a false closed signal. A stuck switch cannot open to its resting state and will falsely indicate that draft pressure is present even when the inducer is off.
A technician must diagnose whether the switch itself is mechanically stuck or whether the wiring has a short. If the switch contacts are stuck, the pressure switch must be replaced. If the wiring has a short, the fault location must be identified and the damaged wiring repaired. Either way, this is not a user-serviceable repair.
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Low stage pressure switch contacts stuck closed | Most common | ✗ Call a pro → |
| Short in pressure switch circuit wiring | Common | ✗ Call a pro → |
When to Call a Professional
Contact a licensed HVAC technician if:
- EE1 displays — a technician must determine whether the low stage pressure switch has failed closed or if there is a short in the switch circuit wiring
- A stuck pressure switch must be replaced; a shorted wiring connection must be located and repaired
- Pressure switch replacement on this furnace requires a qualified HVAC technician to verify the correct replacement switch
✓ Verified against manufacturer service manual — March 2026