Lennox HVAC Error Code E605: How to Fix It

Q: What causes Lennox error code E605?

E605 is triggered when the blower motor stalls or draws excessive electrical current, usually due to clogged air filters, blocked vents, worn motor bearings, faulty capacitors, or debris in the blower assembly restricting airflow.

Q: Can I reset Lennox E605 error without fixing the problem?

While you can temporarily clear the error code, it will return if the underlying issue isn't resolved. Running the system with a stalled blower motor can cause permanent damage to expensive components, so it's important to diagnose and fix the root cause.

Q: How much does it cost to fix Lennox E605 error?

Costs vary depending on the cause: replacing an air filter costs $10-30, a new motor capacitor runs $50-150 including labor, while blower motor replacement can cost $300-800. Simple fixes like cleaning debris or opening blocked vents cost nothing but time.

Q: Is Lennox E605 error dangerous?

Yes, this is considered a high-severity error because a stalled blower motor can overheat and potentially cause electrical fires or permanent damage to the HVAC system. The error should be addressed immediately and the system shouldn't be operated until repairs are complete.

Abstract

Lennox error code E605 indicates your blower motor has stalled or is drawing too much electrical current, which can damage the system if not addressed quickly. This high-severity error typically means the blower motor is overworked due to airflow restrictions, worn bearings, or electrical issues that require immediate attention.