Lennox HVAC Error Code E6: How to Fix It

Q: Can I continue using my HVAC with error code E6?

No, you should not operate the system with error E6 active. The discharge temperature sensor protects the compressor from overheating. Continuing to run the system could cause compressor damage.

Q: How much does it cost to fix Lennox error E6?

DIY replacement of the discharge temperature sensor costs around $20-$50 for the part. If you hire a professional, expect $150-$300 for service call and replacement.

Q: What causes the discharge line sensor to fail?

Common causes include age, vibration damage, loose connections, or exposure to high heat and moisture. The sensor is a thermistor that can degrade over time.

Q: Can a dirty condenser coil cause error E6?

While a dirty coil can cause high discharge temperatures, error E6 specifically points to a sensor fault. However, cleaning the coil and ensuring proper airflow may prevent future issues.

Q: Does Lennox error E6 require a professional to fix?

Not necessarily. If you have basic electrical knowledge and a multimeter, you can test and replace the sensor yourself. However, if you're unsure, call a professional.

Abstract

Your Lennox HVAC system is showing error code E6, which indicates a discharge line temperature sensor fault. This means the sensor reading is out of range or the sensor has failed. You can often resolve this by checking the sensor wiring and resistance, or replacing the sensor if it's faulty.