Lennox HVAC Error Code E46: How to Fix It

Q: What does Lennox error code E46 mean?

Error code E46 indicates the compressor stator is overheating. The system shuts down to protect the compressor from damage.

Q: Can I reset Lennox error E46 myself?

Yes, turn off the system at the thermostat and breaker, wait 30 minutes, then restore power. If the error returns, further diagnosis is needed.

Q: Is a dirty air filter causing error E46?

Yes, restricted airflow due to a dirty filter can cause the compressor to overheat. Always check and replace the filter first.

Q: Should I replace the compressor for error E46?

Only if the compressor windings are damaged or the internal overload is faulty. Check simpler causes like capacitor and refrigerant first. Compressor replacement requires a professional.

Q: How much does it cost to fix Lennox error E46?

If it's just a capacitor or filter, under $50. If refrigerant or compressor replacement is needed, cost can range from $200 to $2,000 depending on refrigerant and labor.

Abstract

Lennox error code E46 indicates the compressor stator has exceeded its safe temperature limit. This can be caused by overloading, poor refrigerant charge, or insufficient airflow. If left unchecked, it may damage the compressor. Follow these steps to diagnose and resolve the issue.