Goodman HVAC Error Code 12: How to Fix It
Medium 30-60 minutes Medium Severity
Verified June 2026
- Error Code
- 12
- Brand
- Goodman
- Product Type
- hvac
- Severity
- Medium
- DIY Difficulty
- Medium
- Estimated Fix Time
- 30-60 minutes
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Tools You'll Need
- Multimeter with capacitance and ohms settings
- Screwdrivers (flathead and Phillips)
- Insulated gloves
How to Fix Error Code 12
-
Turn off power
Always disconnect power before servicing to prevent electric shock or injury. -
Check the start capacitor
-
Inspect the compressor wiring
-
Test the compressor windings
-
Check for a hard start kit or contactor issues
Parts You May Need
Dual run capacitor
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Hard start kit
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Contactor
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Dual run capacitor
Check Price on Amazon
Hard start kit
Check Price on Amazon
Contactor
Check Price on Amazon
Dual run capacitor
Check Price on Amazon
Hard start kit
Check Price on Amazon
Contactor
Check Price on Amazon
Dual run capacitor
Check Price on Amazon
Hard start kit
Check Price on Amazon
Contactor
Check Price on Amazon
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When to Call a Professional
If the compressor windings test faulty (shorted or open) or if you are uncomfortable working with high voltage, call a licensed HVAC technician. Replacing a compressor is a complex, expensive job requiring specialized tools.Frequently Asked Questions
What does error code 12 mean on a Goodman AC?
Error code 12 indicates the compressor is drawing too much current (overcurrent) and the system may shut down to protect itself.
Can a bad capacitor cause error code 12 on Goodman?
Yes, a failing start/run capacitor can cause the compressor to draw high current, triggering error code 12.
How do I reset error code 12 on my Goodman system?
Turn off the power to the unit for 5 minutes, then restore it. If the error returns, there is an underlying issue that needs repair.
Is it safe to replace a Goodman AC capacitor myself?
You can replace a capacitor if you have basic electrical skills and tools. Always discharge the capacitor and turn off power first.
How much does it cost to fix Goodman error code 12?
If it's a capacitor, the part costs $10-$30. Compressor replacement may cost $1,000-$2,500 including labor.