Rheem HVAC Error Code 6: How to Fix It

Q: What does error code 6 mean on a Rheem HVAC system?

Error code 6 on Rheem HVAC systems indicates a pressure switch fault. The system has detected that the pressure switch did not close properly, which usually means there's a vent blockage, a failed inducer motor, or a faulty pressure switch.

Q: Can I reset a Rheem HVAC pressure switch fault?

Yes, you can reset the system by turning off power at the breaker for 30 seconds and then turning it back on. However, if the underlying issue isn't fixed, the error will return. The reset only clears the code temporarily.

Q: How much does it cost to fix a Rheem pressure switch fault?

If you DIY, a replacement pressure switch costs $20-$60. If you hire a professional, expect to pay $150-$300 for diagnosis and repair, depending on the issue and labor rates in your area.

Q: What causes a pressure switch fault on a Rheem furnace?

Common causes include blocked vent pipes, cracked heat exchanger, faulty inducer motor, loose or blocked pressure switch hoses, or a defective pressure switch itself.

Q: Is it safe to run my Rheem furnace with error code 6?

No, do not continue to run the furnace with error code 6. The pressure switch is a safety device that prevents operation if there's a problem with venting. Running it could lead to carbon monoxide poisoning or damage to the system.

Abstract

Rheem HVAC error code 6 indicates a pressure switch fault, meaning the system has detected abnormal pressure in the venting or the pressure switch is not closing properly. This can be caused by a blocked vent, faulty pressure switch, or issues with the inducer motor. Follow these steps to diagnose and fix the problem.