Lennox HVAC Error Code E37: How to Fix It

Q: Can I reset Lennox error code E37 without a repair?

Sometimes a simple power cycle (turn off the breaker for 30 seconds) can clear temporary faults. However, if the underlying problem remains (like a bad motor or blockage), the error will return.

Q: What does E37 mean on a Lennox furnace?

E37 indicates an inducer motor fault. The inducer motor is responsible for drawing combustion air into the furnace and pushing exhaust gases out through the flue. The error means the motor is not operating correctly or is not sending the proper feedback signal.

Q: How much does it cost to fix E37?

If the fix is just a capacitor replacement, parts cost around $10-20. If the inducer motor needs replacing, parts range from $150 to $400, plus labor. Professional service calls typically add $100-200 for diagnosis.

Q: Can a dirty filter cause code E37?

A very dirty air filter can restrict airflow, but it's unlikely to directly cause E37. However, a blocked filter can lead to other issues like overheating. Always change your filter regularly.

Q: What tools do I need to diagnose Lennox E37?

You'll need a multimeter (preferably with capacitance testing), screwdrivers, and possibly a shop vacuum for cleaning. Safety tools like insulated gloves are recommended.

Abstract

Error code E37 on your Lennox HVAC system indicates an inducer motor fault. The inducer motor pulls air through your furnace and pushes exhaust gases out. This error can stop your system from operating, but many causes are easy to diagnose yourself.