Goodman HVAC Error Code 10 Flash: How to Fix It
Medium 30-60 minutes High Severity
Verified June 2026
- Error Code
- 10 flash
- Brand
- Goodman
- Product Type
- hvac
- Severity
- High
- DIY Difficulty
- Medium
- Estimated Fix Time
- 30-60 minutes
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Tools You'll Need
- Digital multimeter
- Screwdriver set
- Wire strippers
- Electrical tape
How to Fix Error Code 10 flash
-
Turn Off Power and Check Circuit Breaker
Always turn off power at the breaker before working on electrical components to prevent shock or electrocution. -
Inspect Electrical Connections at Unit
Ensure power is completely off before removing panels or touching any electrical components. -
Test Voltage at Disconnect Box
Use extreme caution when measuring live voltage. If you're not comfortable with electrical testing, contact a professional. -
Check Indoor Unit Voltage Supply
-
Inspect Transformer if Low Control Voltage
-
Contact Utility Company if Main Power is Low
-
Reset System After Repairs
Parts You May Need
HVAC transformer
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Wire nuts and electrical connectors
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Electrical wire
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HVAC transformer
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Wire nuts and electrical connectors
Check Price on Amazon
Electrical wire
Check Price on Amazon
HVAC transformer
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Electrical wire
Check Price on Amazon
HVAC transformer
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Electrical wire
Check Price on Amazon
HVAC transformer
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Electrical wire
Check Price on Amazon
HVAC transformer
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Electrical wire
Check Price on Amazon
HVAC transformer
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Electrical wire
Check Price on Amazon
HVAC transformer
Check Price on Amazon
Wire nuts and electrical connectors
Check Price on Amazon
Electrical wire
Check Price on Amazon
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When to Call a Professional
Call a licensed HVAC technician or electrician if you find burnt wires, need transformer replacement, or if utility power issues persist. Also call a professional if you're uncomfortable working with electrical components or if the error persists after checking all connections.Frequently Asked Questions
What causes Goodman 10 flash error code?
The 10 flash error occurs when line voltage drops below 95VAC, typically due to utility brownouts, loose electrical connections, failing transformers, or overloaded electrical circuits.
Can I reset Goodman 10 flash error myself?
You can reset the error by turning the system off and back on, but the error will return unless the underlying voltage issue is fixed. Address the root cause first.
Is it safe to run my AC with 10 flash error?
No, the system shuts down to protect components from damage caused by low voltage. Running equipment on low voltage can damage compressors and motors.
How do I know if the problem is my house wiring or utility power?
Test voltage at your main electrical panel. If it's low there, it's a utility issue. If panel voltage is normal but HVAC voltage is low, it's likely your house wiring or connections.
Will Goodman 10 flash error damage my system?
The error code is a protective feature that prevents damage. However, if ignored and the system is forced to run on low voltage, it can damage the compressor and other electrical components.