Lennox HVAC Error Code E201: How to Fix It

Q: What does Lennox error code E201 mean?

Lennox E201 means the pressure switch is open when it should be closed during furnace operation. This indicates an airflow or pressure sensing problem that prevents safe heating operation.

Q: Can I reset Lennox E201 error code?

You can reset the error by turning off the thermostat for 5 minutes then back on, but this won't fix the underlying problem. The E201 will return until the pressure switch or airflow issue is resolved.

Q: How much does it cost to fix Lennox E201 error?

Simple fixes like replacing an air filter cost $15-30. Professional pressure switch replacement typically costs $150-300. More complex issues like inducer motor replacement can cost $300-600.

Q: Is Lennox E201 error dangerous?

The E201 error is a safety shutdown that prevents potentially dangerous operation. While not immediately dangerous, it indicates your furnace cannot operate safely and should be repaired promptly, especially in cold weather.

Q: Why does my Lennox furnace keep getting E201 error?

Recurring E201 errors usually indicate a failing pressure switch, chronic airflow problems from dirty filters, blocked venting, or issues with the inducer motor. Professional diagnosis is recommended for persistent problems.

Abstract

The Lennox E201 error code indicates that the pressure switch is open when it should be closed during the heating cycle. This safety issue prevents your furnace from operating properly and typically relates to airflow problems, a faulty pressure switch, or blocked venting.