Error code reference

Lennox Air Conditioner Error Code E131

The outdoor unit control parameters are corrupted.

The outdoor unit control parameters are corrupted.

First step from the service manual

Reconfigure the system. Replace the control if heating or cooling is not available.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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E131 on my Lennox Air Conditioner

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The outdoor unit control parameters are

From Service Manual 876050, p.22:

1.Reconfigure the system. Replace the control if heating or cooling is not available.

2.Measure door lock assembly resistance across the PTC terminals. Expected: ~200 ohms cold, rising sharply once energized.

3.Inspect strike and latch alignment. A warped door or misaligned strike prevents the switch stack from closing in the correct sequence.

Part W10810403

Door lock assembly

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