Lennox HVAC Error Code E413: How to Fix It

Q: What causes Lennox error code E413?

E413 is caused by reversing valve faults during defrost, typically due to a failed solenoid coil, stuck valve mechanism, low refrigerant, electrical connection issues, or control board problems.

Q: Can I reset Lennox error E413 myself?

You can clear the error by cycling power to the system, but E413 will return if the underlying reversing valve problem isn't fixed. The error indicates a serious component failure that requires repair.

Q: How much does it cost to fix a reversing valve fault?

Solenoid coil replacement costs $150-300, while full reversing valve replacement ranges from $400-800 including labor. Diagnostic fees typically run $100-150.

Q: Is it safe to run my heat pump with error E413?

No, continuing to run with E413 can damage the compressor and other components. The system cannot properly defrost, leading to ice buildup and reduced efficiency.

Q: How often should reversing valves be replaced?

Reversing valves typically last 10-15 years with proper maintenance. However, solenoid coils may fail sooner due to electrical stress and should be inspected during annual maintenance.

Abstract

The Lennox E413 error code indicates a reversing valve fault during the defrost cycle in your heat pump system. This critical error means the reversing valve cannot properly switch between heating and cooling modes, preventing your system from completing its defrost sequence and maintaining proper operation.