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
The Goodman 10 flash error code indicates low line voltage, meaning your HVAC unit is receiving less than 95VAC due to brownout conditions or electrical issues. This protective feature shuts down your system to prevent damage from insufficient power supply.
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Tools You'll Need

How to Fix Error Code 10 flash

  1. Turn Off Power and Check Circuit Breaker

    Always turn off power at the breaker before working on electrical components to prevent shock or electrocution.
  2. Inspect Electrical Connections at Unit

    Ensure power is completely off before removing panels or touching any electrical components.
  3. Test Voltage at Disconnect Box

    Use extreme caution when measuring live voltage. If you're not comfortable with electrical testing, contact a professional.
  4. Check Indoor Unit Voltage Supply

  5. Inspect Transformer if Low Control Voltage

  6. Contact Utility Company if Main Power is Low

  7. Reset System After Repairs

Parts You May Need

HVAC transformer
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Electrical wire
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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
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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
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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.