Goodman Furnace Error Code 11 Flash: How to Fix It

Q: What causes Goodman furnace error code 11 flash?

Error code 11 flash is caused by the 115V neutral wire being reversed with the ground wire in your electrical supply to the furnace. This can happen during installation, electrical work, or due to loose connections over time.

Q: Is Goodman error code 11 flash dangerous?

Yes, this error indicates a serious electrical safety hazard. Reversed neutral and ground can cause electrical shock, damage to furnace components, or fire risks. The furnace should not be operated until this issue is corrected.

Q: Can I run my Goodman furnace with error code 11 flash?

No, you should not operate your furnace with this error code. The reversed wiring creates unsafe electrical conditions and can damage your furnace or create fire and shock hazards.

Q: How much does it cost to fix Goodman error code 11 flash?

If hiring an electrician, expect to pay $150-400 depending on the complexity of the wiring issue and your location. If it's a simple connection fix, costs will be lower, but if electrical panel work is needed, costs increase.

Q: Will Goodman error code 11 flash damage my furnace?

Yes, continued operation with reversed neutral and ground can damage the control board, blower motor, and other electrical components in your furnace. It's important to fix this issue immediately to prevent costly component damage.

Abstract

Goodman furnace error code 11 flash indicates a serious electrical wiring problem where the 115V neutral wire is reversed with the ground wire. This is a dangerous condition that can cause electrical shock, damage to your furnace components, or even fire hazards.