Goodman GMVC960803BN Error Code EE1: Low Stage Pressure Switch Stuck Closed
What Does Code EE1 Mean?
Error code EE1 on the Goodman GMVC960803BN means the integrated control module checked the low-stage pressure switch at the very start of a heating cycle and found its circuit already closed. On this furnace that switch is supposed to be OPEN at rest, before the induced draft blower has started and created any draft. When the module sees it closed too early, it cannot trust the switch to prove that venting is safe, so it refuses to light the burners and posts EE1.
The GMVC960803BN is a two-stage, variable-speed 96% AFUE furnace, so it carries separate pressure switches for its low and high firing rates. Each switch verifies that the inducer is pulling the correct negative draft for that stage before gas is allowed to flow. EE1 is specifically the low-stage switch failing the pre-start check by being stuck closed. That makes it the mirror image of code EE2, where the same low-stage switch is faulted for the opposite reason — it fails to close after the inducer runs. It is also the low-stage counterpart of EE8, the identical stuck-closed fault on the high-stage switch.
Because EE1 blocks ignition entirely, the homeowner experience is a complete no-heat condition, not the partial heat seen with the high-stage codes. The most common cause is a set of pressure switch contacts that have stuck or fused in the closed position. A short in the pressure switch circuit wiring — for example two conductors chafed together — can create a continuous electrical path that looks identical to a closed switch and produces the same code.
What You'll Notice
- The furnace does not start a heating cycle and there is no heat at all
- The 7-segment diagnostic display reads EE1
- The burners never light even though the thermostat is calling for heat
- The fault appears at the very beginning of the cycle, before the inducer proves draft
- Resetting power may briefly clear the code, but it returns on the next call for heat
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Low stage pressure switch contacts sticking closed | Most common | ✗ Call a pro → |
| Short in pressure switch circuit wiring | Common | ✗ Call a pro → |
How This Is Diagnosed
A technician first reads the EE1 code and then confirms with a multimeter that the low-stage pressure switch shows continuity (a closed circuit) while the induced draft blower is off — the switch should read open at rest. If it reads closed with no draft applied, the switch itself is failed and is replaced.
If the switch tests open when isolated, the technician inspects the wiring harness and connector for the low-stage switch, looking for a short between conductors, a pinched wire against the cabinet, or moisture in the connector that could bridge the circuit. The underlying fault is corrected before the furnace is returned to service.
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:
- EE1 appears at the start of every heating cycle and the furnace never lights
- The low-stage pressure switch reads closed on a meter while the inducer is off
- The code persists after the switch has been replaced, pointing to a wiring short
- Wiring near the pressure switch shows chafing, pinching, or moisture in the connector
Frequently Asked Questions
Can I fix a stuck-closed pressure switch myself?
No. Testing and replacing a pressure switch and tracing a wiring short require a multimeter and knowledge of the furnace's safety circuit, so this is a job for a qualified HVAC technician. The pressure switch is part of the venting safety system and should never be jumpered or bypassed.
How is EE1 different from EE2 on my furnace?
Both codes involve the same low-stage pressure switch, but they are opposite faults. EE1 means the switch is stuck closed before the cycle starts, while EE2 means the switch fails to close after the inducer starts running. EE1 usually points to a bad switch or a wiring short, whereas EE2 more often points to a venting or hose blockage.
How much does it cost to repair EE1?
A pressure switch is an inexpensive part, and most of the cost is the diagnostic and labor time. Actual pricing varies by region and by whether the fault turns out to be the switch or a wiring problem, so ask your technician for an estimate after they diagnose it.
✓ Verified against manufacturer service manual — March 2026