Carrier 58MVP Furnace Error Codes

Variable Speed Gas Furnace | Control Board: Variable-Capacity Microprocessor Control Board (320624-101)

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Disclaimer
This information is for reference purposes only and does not guarantee accuracy or completeness. Always consult your owner's manual and a licensed HVAC technician for diagnosis and repair. Any actions taken based on this information are at your own risk.

All Error Codes

Code Name Severity DIY?
RED LED1 ON (solid) Emergency Heat Medium ✗ Call a pro →
RED LED2 ON (solid) Microprocessor Malfunction Critical ✗ Call a pro →
YELLOW LED3 ON (solid) High Heat Operation Info — →
GREEN LED4 ON (solid) Low Heat Operation Info — →
RED LED2 FLASHING Line Voltage Polarity Reversed High ✗ Call a pro →
Code 11 No Fault in Recent History Display Info — →
Code 12 Blower Calibration Lockout High ✓ Yes →
Code 13 Limit Switch Lockout High ✓ Yes →
Code 14 Ignition Lockout Critical ✓ Yes →
Code 21 Invalid Model Selection Medium ✗ Call a pro →
Code 22 Setup Error Medium ✓ Yes →
Code 23 Invalid Blower Airflow Selection Low ✓ Yes →
Code 24 Secondary Voltage Fuse Is Open High ✗ Call a pro →
Code 31 High Pressure Switch Fault High ✓ Yes →
Code 32 Low Pressure Switch Fault High ✓ Yes →
Code 33 Limit or Flame Roll-Out Switch Is Open High ✓ Yes →
Code 34 Ignition Proving Fault High ✓ Yes →
Code 41 Blower Outside Valid Speed Range High ✓ Yes →
Code 42 Inducer Outside Valid Speed Range High ✓ Yes →
Code 43 Pressure Switch Calibration Fault High ✓ Yes →
Code 44 Blower Calibration Fault Medium ✓ Yes →

How to Read the Error Code

Two-digit status codes displayed via LED flashes. The first digit is the number of YELLOW LED3 flashes; the second digit is the number of GREEN LED4 flashes. Additionally, four solid LED indicators show operating mode and one flashing LED indicates reversed polarity.

About This Model

The Carrier 58MVP is a variable speed gas furnace using the Variable-Capacity Microprocessor Control Board (320624-101)-series integrated furnace control (IFC) board.