Goodman HVAC Error Code 11: How to Fix It
Medium 30-60 minutes Medium Severity
Verified June 2026
- Error Code
- 11
- 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 resistance settings
- Insulated screwdriver
- Resistor for capacitor discharge (optional)
- Replacement contactor (if needed)
- Replacement capacitor (if needed)
How to Fix Error Code 11
-
Power Off and Safety Check
Always disconnect power before servicing HVAC equipment to avoid electrical shock. -
Inspect the Contactor
Be careful not to touch live wires. -
Test the Start/Run Capacitor
Capacitors can hold a dangerous charge even when power is off. Discharge them properly before testing. -
Check Wiring Connections
-
Test Compressor Windings
Only perform this test if comfortable with electrical diagnostics. If unsure, call a technician.
Parts You May Need
Run capacitor (dual run 35/5 µF or as specified)
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Contactor (24V coil, 30A or 40A rated)
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Run capacitor (dual run 35/5 µF or as specified)
Check Price on Amazon
Contactor (24V coil, 30A or 40A rated)
Check Price on Amazon
Run capacitor (dual run 35/5 µF or as specified)
Check Price on Amazon
Contactor (24V coil, 30A or 40A rated)
Check Price on Amazon
Run capacitor (dual run 35/5 µF or as specified)
Check Price on Amazon
Contactor (24V coil, 30A or 40A rated)
Check Price on Amazon
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When to Call a Professional
If the compressor is burned out (open windings) or if you are not comfortable working with high voltage, call a licensed HVAC technician. Also call if the compressor is shorted to ground (low resistance to ground) or if the system has refrigerant issues.Frequently Asked Questions
Can I reset Goodman error code 11 myself?
Yes, but only after fixing the underlying issue. Turn off power to the unit for 5 minutes, then restore power. If the problem persists, the error will reappear.
What does error code 11 mean on Goodman AC?
It means the compressor is not running, often due to a faulty capacitor, contactor, or wiring issue.
How do I test a Goodman AC capacitor?
Use a multimeter set to capacitance (µF). Discharge the capacitor, then touch the probes to the terminals. Compare the reading to the rated value; replace if it's more than 10% off.
Is it safe to replace a contactor myself?
Yes, if you have basic electrical knowledge and the power is off. Match the amp and voltage ratings exactly. Otherwise, hire a professional.
How much does it cost to fix Goodman error code 11?
If you DIY, a capacitor costs $10-$30, a contactor $20-$50. Professional service including diagnosis and repair typically ranges from $150-$400.