E10 Grounding fault / poor neutral connection

What the control is telling you

The control detected a grounding error or a poor neutral connection. The furnace will not operate.

Applies to: Goodman/Amana/GMC gas furnaces, 9-speed ECM, 7-segment control. Two-stage 96%: AC9C96, AM9C96, GC9C96, GM9C96. Single stage 80%: VC9S80, VM9S80, AC9S80, AM9S80, GC9S80, GM9S80. Single stage 92/96%: VC9S96, VM9S96, AC9S96, AM9S96, AM9S92, GC9S96, GM9S96, GM9S92

Likely causes

• Loose or high-resistance neutral connection
• Missing or poor ground path

Test and repair steps

1. Check the neutral wire connection at the furnace junction box, the control board and the panel; tighten or repair.
2. Verify continuity from the furnace to the ground source (ground wire back to the panel).
3. Power off and measure neutral (white) to burner resistance - it should be very low (manual: less than 2 ohms).
4. Restore power and confirm the code clears.

Settings for these units

Normal status displays (7-segment) · Goodman/Amana GM9S96/AM9S96

These are normal operating displays, not fault codes.

Normal status displays (7-segment) · Goodman/Amana GM9S80/AM9S80

These are normal operating displays, not fault codes.

• Normal status displays (7-segment) · Goodman/Amana GM9C96/AM9C96
• Minimum recommended filter size · Goodman/Amana GM9C96/AM9C96

Models that show this code

80 models in Goodman/Amana GM9S96/AM9S96, Goodman/Amana GM9S80/AM9S80, Goodman/Amana GM9C96/AM9C96

Other codes on the same units

• E11 Flame rollout switch open
• EE0 Lockout - too many ignition retries (3)
• EE1 Pressure switch closed at start of heating cycle
• EE2 Pressure switch did not close (inducer runs, no ignition)
• EE3 High (primary) limit open
• EE4 Flame sensed with no call for heat
• EE5 Open fuse (short in low voltage wiring)
• EE6 Low flame signal