Amana AMVM970803BN Error Code EE1: Low Stage Pressure Switch Closed at Start
What Does Code EE1 Mean?
Before ignition, the integrated control module expects the low-stage pressure switch to be open, then to close once the inducer establishes draft. Code EE1 means the low-stage switch was already closed at the start of the cycle — a stuck-closed condition — so the module cannot verify draft safely and refuses to fire.
On this modulating furnace there are separate pressure switches for low and high stage. EE1 is specifically the low-stage switch being closed when it should be open, usually from sticking contacts or a short in the switch wiring.
EE1 is one of a set of four pressure-switch codes on this board. EE8 is the same "closed at start" fault on the high-stage switch, while EE2 (low stage) and EE9 (high stage) are the opposite problem — a switch that fails to close. Describing them precisely matters: EE1 is a low-stage switch stuck closed, not a general low-heat draft failure.
What You'll Notice
- The furnace will not ignite and the display shows EE1
- The fault appears at the very start of the heat call, before ignition
- The furnace may have failed intermittently before latching this code
- No burner operation despite a call for heat
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 → |
How This Is Diagnosed
A technician checks the low-stage pressure switch to see whether its contacts are stuck closed, and inspects the switch circuit wiring for a short that would keep the circuit closed. The switch is tested for correct open/close behavior against draft.
If the contacts stick, the pressure switch is replaced; if the wiring is shorted, it is repaired. This is a component and wiring diagnosis, not a homeowner task.
When to Call a Professional
This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:
- The display shows EE1 and the furnace will not ignite
- The fault occurs immediately at the start of each heat call
- You suspect a stuck switch after repeated no-ignition events
Frequently Asked Questions
What does "closed at start" mean for EE1?
The low-stage pressure switch should be open before the inducer runs. EE1 means it was already closed at startup, which usually indicates stuck contacts or a wiring short that a technician must correct.
Is EE1 the same as a blocked vent?
No. A blocked vent typically prevents a switch from closing (codes EE2 or EE9). EE1 is the reverse — the switch is stuck closed before the cycle even begins.
✓ Verified against manufacturer service manual — March 2026