Carrier Furnace Error Code 42 Flash: How to Fix It

Q: What does Carrier furnace error code 42 mean?

Error code 42 on a Carrier furnace means the inducer motor speed is out of range or the motor failed to start. This prevents the furnace from operating safely.

Q: Can I run my Carrier furnace with error code 42?

No, never attempt to run your furnace with error code 42. This error indicates a safety issue with the inducer motor, which is essential for proper venting of combustion gases.

Q: How much does it cost to fix Carrier error code 42?

Repair costs range from $50-200 for simple fixes like cleaning or wiring repairs, to $300-600 for inducer motor replacement including labor. Exact costs depend on your location and the specific issue.

Q: How long does a Carrier furnace inducer motor last?

Inducer motors typically last 10-15 years with proper maintenance. Factors like dirty filters, blocked vents, and lack of maintenance can shorten their lifespan significantly.

Q: What causes Carrier furnace inducer motor failure?

Common causes include dirty air filters restricting airflow, blocked exhaust vents, worn motor bearings, electrical issues, and normal wear over time. Regular maintenance helps prevent premature failure.

Abstract

Carrier furnace error code 42 flash indicates the inducer motor speed is out of range or the motor failed to start. This is a serious safety issue that prevents your furnace from operating, as the inducer motor is essential for proper venting of combustion gases.