Rheem HVAC Error Code 42: How to Fix It

Q: What causes Rheem error code 42?

Error code 42 is caused by a faulty inducer motor that either has open windings (electrical failure) or is mechanically seized. This can result from normal wear, debris accumulation, or electrical issues.

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

No, you cannot run your furnace with error code 42. The system will shut down for safety because the inducer motor is essential for proper venting of combustion gases.

Q: How much does it cost to replace a Rheem inducer motor?

A replacement inducer motor typically costs $150-$400 for the part, plus $200-$500 for professional installation. The total cost depends on your specific model and local labor rates.

Q: How long do Rheem inducer motors last?

Rheem inducer motors typically last 10-15 years with proper maintenance. Regular filter changes and annual maintenance can help extend motor life by reducing debris accumulation.

Q: Is Rheem error code 42 dangerous?

Yes, error code 42 can be dangerous if ignored. A non-functioning inducer motor prevents proper venting of combustion gases, which could lead to carbon monoxide buildup. The system shuts down automatically for safety.

Abstract

Rheem error code 42 indicates your inducer motor has stopped running due to either an open winding or a seized motor. This is a serious issue that prevents proper venting of combustion gases and will shut down your heating system for safety.