Goodman GMVC960803BN Error Code EEA: Reversed Line Polarity
What Does Code EEA Mean?
EEA on the Goodman GMVC960803BN means the integrated control module has sensed that the 115VAC line and neutral connections are reversed. The furnace will not operate, because this model requires correct polarity and a solid neutral and ground for its safety and flame-sensing circuits to work.
The flame sense system uses flame rectification — it reads the tiny DC microamp current a flame allows to pass between the sensor rod and the grounded burner. That measurement only works when line and neutral sit on their correct terminals. Reversed polarity disrupts the reference and can cause nuisance flame-sensing problems in addition to the EEA lockout.
The most common cause is hot (black) and neutral (white) being swapped at the furnace disconnect, an outlet, or the breaker panel — often introduced during a recent installation or electrical repair. A poor or missing unit ground can accompany the fault. Because this is line-voltage wiring, correcting it is an electrician's or HVAC technician's job, not a homeowner reset.
What You'll Notice
- The furnace does not operate even though it clearly has power
- The 7-segment display shows EEA
- The problem appeared immediately after installation, an outlet change, or other electrical work
- Intermittent flame-sensing complaints may show up alongside the EEA fault
Common Causes
How This Is Diagnosed
A technician measures the 115VAC supply at the furnace with a voltmeter to confirm the hot and neutral conductors land on the correct terminals, then traces any reversal back to the disconnect switch, outlet, or breaker panel. Unit ground continuity is verified as well, since a poor ground often accompanies a polarity fault.
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:
- EEA is present and the 115VAC wiring polarity at the furnace disconnect and breaker panel must be verified and corrected
- The unit ground connection is poor or absent and a proper equipment ground must be established before the furnace is returned to service
- The fault appeared right after electrical work and the recent wiring change needs to be inspected
Frequently Asked Questions
Why does polarity matter on a furnace?
The flame sensor relies on flame rectification, which depends on correct line/neutral orientation and a solid ground. Reversed polarity breaks that reference, so the control board reports EEA and refuses to run.
Can I just reset the furnace to clear EEA?
No. EEA reflects an actual wiring problem, most often introduced during recent work at the furnace or outlet. It has to be physically corrected by an electrician or technician rather than reset away.
✓ Verified against manufacturer service manual — March 2026