Carrier HVAC Error Code 57: How to Fix It
Medium 45 minutes to 1.5 hours Medium Severity
Verified June 2026
- Error Code
- 57
- Brand
- Carrier
- Product Type
- hvac
- Severity
- Medium
- DIY Difficulty
- Medium
- Estimated Fix Time
- 45 minutes to 1.5 hours
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Tools You'll Need
- New air filter (same size as old)
- Vacuum with brush attachment
- Multimeter (capacitance testing)
- Insulated screwdriver
- Coil cleaner (optional)
- Soft brush
How to Fix Error Code 57
-
Check and Replace the Air Filter
Always turn off power before servicing to prevent injury or damage. -
Inspect and Clear Supply and Return Vents
-
Examine the Evaporator Coil for Frost or Ice
Do not attempt to chip off ice; let it thaw naturally to avoid damaging the coil. -
Test the Blower Motor and Capacitor
Discharge the capacitor by shorting its terminals with an insulated screwdriver before handling. -
Check for Ductwork Blockages
Parts You May Need
Air filter
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Blower motor capacitor
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Blower motor
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Evaporator coil cleaner
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Air filter
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Blower motor capacitor
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Blower motor
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Evaporator coil cleaner
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Air filter
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Blower motor capacitor
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Blower motor
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Evaporator coil cleaner
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Air filter
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Blower motor capacitor
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Blower motor
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Evaporator coil cleaner
Check Price on Amazon
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When to Call a Professional
If the error persists after checking filter, vents, and blower, or if you find a frozen coil repeatedly, call a licensed HVAC technician. They can check refrigerant levels, thermostat wiring, and the control board. Also call if you suspect a bad blower motor or capacitor and are uncomfortable with electrical work.Frequently Asked Questions
What does error code 57 mean on a Carrier furnace?
It indicates an airflow restriction. Common causes are a dirty air filter, blocked vents, or a failing blower motor.
How do I reset Carrier HVAC error code 57?
Turn off the thermostat and circuit breaker for 30 seconds, then restore power. If the error returns, there is an underlying issue that needs fixing.
Can a dirty air filter cause error code 57?
Yes, a dirty filter is the most common cause. Replace it and see if the error clears.
Is it safe to run my Carrier HVAC with error 57?
No. Running with restricted airflow can damage the compressor or heat exchanger and cause system failure. Turn off the system until fixed.
How much does it cost to fix Carrier error 57?
DIY cost: $10-$30 for a filter. If a blower motor replacement is needed, $200-$500 for the part, plus labor if you hire a pro.