Goodman HVAC Error Code 15 Flash: How to Fix It
Medium 30-60 minutes High Severity
Verified June 2026
- Error Code
- 15 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
- Phillips screwdriver
- Flathead screwdriver
- Multimeter
- Wire strippers
- Electrical tape
How to Fix Error Code 15 flash
-
Turn Off Power to Unit
Always disconnect power before working on HVAC equipment to prevent electrical shock or injury. -
Check All Wiring Connections
Use insulated tools and ensure power is completely off before touching any wires or connections. -
Inspect Communication Cables
-
Test Control Board Connections
-
Reset the System
-
Check for Inverter Faults
Do not attempt to repair the inverter module yourself - this requires specialized training and equipment. -
Verify Control Board Function
Parts You May Need
Communication wiring harness
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Control board
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Inverter module
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Wire nuts
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Communication wiring harness
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Control board
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Inverter module
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Wire nuts
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Communication wiring harness
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Control board
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Inverter module
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Wire nuts
Check Price on Amazon
Communication wiring harness
Check Price on Amazon
Control board
Check Price on Amazon
Inverter module
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Wire nuts
Check Price on Amazon
Communication wiring harness
Check Price on Amazon
Control board
Check Price on Amazon
Inverter module
Check Price on Amazon
Wire nuts
Check Price on Amazon
Communication wiring harness
Check Price on Amazon
Control board
Check Price on Amazon
Inverter module
Check Price on Amazon
Wire nuts
Check Price on Amazon
Communication wiring harness
Check Price on Amazon
Control board
Check Price on Amazon
Inverter module
Check Price on Amazon
Wire nuts
Check Price on Amazon
Communication wiring harness
Check Price on Amazon
Control board
Check Price on Amazon
Inverter module
Check Price on Amazon
Wire nuts
Check Price on Amazon
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When to Call a Professional
Call a certified HVAC technician if the communication wiring is intact but the error persists, if you're uncomfortable working with electrical components, or if the inverter or control board needs replacement. These components require proper refrigerant handling and electrical expertise.Frequently Asked Questions
What causes Goodman 15 flash error code?
The 15 flash error is caused by communication failure between the control board and inverter, typically due to loose wiring connections, damaged communication cables, or faulty control board or inverter components.
Can I run my Goodman HVAC with 15 flash error?
No, the 15 flash error prevents normal operation and indicates a serious communication problem. Continuing to attempt operation may cause additional damage to system components.
How much does it cost to fix Goodman 15 flash error?
Repair costs vary from $150-300 for wiring issues to $500-1200 for control board or inverter replacement, depending on the specific component that needs replacement and local labor rates.
How long does Goodman 15 flash error repair take?
Simple wiring repairs take 30-60 minutes, while control board or inverter replacement typically requires 1-3 hours depending on system accessibility and component availability.