Carrier 58MVC Furnace Error Codes

Variable Speed Gas Furnace | Control Board: Variable Speed Furnace Control

Not your model? View all Carrier models →

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?
LED Continuous OFF No Power Critical ✓ Yes →
LED Continuous ON Control Has 24 VAC Power Info — →
Rapid Flashing LED Line Voltage Polarity Reversed Critical ✗ Call a pro →
Status Code 11 No Previous Code Info — →
Status Code 12 Blower On After Power Up Medium ✓ Yes →
Status Code 13 Limit Circuit Lockout Critical ✓ Yes →
Status Code 14 Ignition Lockout Critical ✓ Yes →
Status Code 15 Blower Motor Lockout Critical ✗ Call a pro →
Status Code 21 Gas Heating Lockout Critical ✗ Call a pro →
Status Code 22 Abnormal Flame-Proving Signal Critical ✗ Call a pro →
Status Code 23 Pressure Switch Did Not Open Medium ✓ Yes →
Status Code 24 Secondary Voltage Fuse Is Open Critical ✗ Call a pro →
Status Code 25 Model Selection or Setup Error Medium ✓ Yes →
Status Code 31 Medium-Heat Pressure Switch or HPSR Relay Did Not Close or Reopened Critical ✓ Yes →
Status Code 32 Low-Heat Pressure Switch Did Not Close or Reopened Critical ✓ Yes →
Status Code 33 Limit Circuit Fault Medium ✓ Yes →
Status Code 34 Ignition-Proving Fault Medium ✓ Yes →
Status Code 41 Blower Motor Fault Critical ✗ Call a pro →
Status Code 42 Inducer Motor Fault Critical ✓ Yes →
Status Code 43 Low-Heat Pressure Switch Open While Medium-Heat Pressure Switch Is Closed Critical ✗ Call a pro →
Status Code 45 Control Circuitry Lockout Critical ✗ Call a pro →

How to Read the Error Code

Status codes are displayed via an AMBER LED visible through the blower access panel sight glass. Each code is a 2-digit number: the first digit is determined by the number of short flashes and the second digit by the number of long flashes. The control stores all status codes for 72 hours regardless of power interruption. LED states also include continuous OFF, continuous ON, and rapid flashing.

About This Model

The Carrier 58MVC is a variable speed gas furnace using the Variable Speed Furnace Control-series integrated furnace control (IFC) board.