Error code reference

Lennox Heat Pump Error Code 14

Control is in TEST mode; does not indicate a problem.

Lennox codes Lennox heat pump codes

Control is in TEST mode; does not indicate a problem.

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14 on my Lennox Heat Pump

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Control is in TEST mode

From Service Manual 611457, p.29:

1.Access service mode to confirm the active fault code and read stored error history.

2.Measure control board supply voltage at the test points. Expected: 12 VDC and 5 VDC; a drop below 4.75 VDC on the logic rail points to a failed onboard regulator.

3.Inspect all connectors on the main control for corrosion, thermal stress, or backed-out pins. Reseat each connector with the power disconnected.

Part WPW10804018

Electronic control board

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