Rheem HVAC Error Code 6 Flash: How to Fix It

Q: How often should I clean my Rheem furnace flame sensor?

Clean your flame sensor annually as part of regular furnace maintenance, typically before the heating season begins. If you experience frequent shutdowns or error codes, you may need to clean it more often.

Q: Can a dirty air filter cause Rheem 6 flash error?

Yes, a dirty air filter can contribute to flame sensor issues by affecting combustion air flow and causing incomplete combustion, which leads to more soot buildup on the sensor rod.

Q: What does the flame sensor do in my Rheem furnace?

The flame sensor detects the presence of flame by measuring electrical current. It's a safety device that shuts down the gas valve if no proper flame is detected, preventing gas from flowing without ignition.

Q: How much does it cost to replace a Rheem flame sensor?

A replacement flame sensor typically costs $20-50 for the part. Professional installation usually adds $100-200 in labor costs, making the total repair cost $120-250.

Q: Why does my Rheem furnace keep getting 6 flash error after cleaning?

If the error persists after cleaning, the sensor may be faulty and need replacement, there could be wiring issues, or other components like the ignitor or gas valve may have problems requiring professional diagnosis.

Abstract

The Rheem 6 flash error indicates low flame current, which means your furnace's flame sensor rod isn't detecting proper flame strength. This usually happens when the flame rod gets dirty or corroded, preventing it from reading the flame signal correctly and causing your furnace to shut down for safety.