Error Code Code 42
Carrier 58MVP Error Code Code 42: Inducer Outside Valid Speed Range
TL;DR
Indicates the inducer motor is not operating at the calculated RPM, or has not started within 10 seconds after a call for heat. Check wiring to motor; otherwise refer to the troubleshooting guide. Disclaimer
This article is for informational purposes only and does not guarantee the accuracy or completeness of the information provided. Always turn off power and gas supply before attempting any repairs. If you smell gas, leave immediately and call your gas company. Consult a licensed HVAC technician for diagnosis and repair. Any actions taken based on this information are at your own risk. What Does Code Code 42 Mean?
Indicates the inducer motor is not operating at the calculated RPM, or has not started within 10 seconds after a call for heat. Check wiring to motor; otherwise refer to the troubleshooting guide.
Common Causes
When to Call a Professional
Contact a licensed HVAC technician if:
- Basic troubleshooting did not resolve the error
- You smell gas at any point during the process
- You are not comfortable working around gas lines or electrical components
- The unit needs a gas valve, control board, or motor replacement