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Lennox furnace error code e240

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lennox furnace error code e240

If you’re seeing an E240 error code on your Lennox furnace, it indicates a problem with the communication between the control board and the blower motor. Various issues, including a faulty control board or blower motor, loose wiring connections, or a malfunctioning sensor, can cause this.

To troubleshoot the issue, you’ll need to check the wiring connections between the control board and the blower motor. Make sure all connections are tight and secure. You may also want to check the sensor to ensure it’s functioning properly.

If you’re still experiencing the error code after checking these components, you’ll likely need to replace either the control board or the blower motor. In this case, it’s best to consult a professional HVAC technician who can diagnose the issue and provide a solution.