Lennox Air Conditioner Error Code E438
The inverter has detected a PFC over current condition caused by a high load condition, high pressure, or outdoor fan failure (inverter code 73).
SourceLennox Air Conditioner - Service Manual: Elite Series XC20p. 34
The full E438 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
SourceLennox Air Conditioner - Service Manual: Elite Series XC20p. 34
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Where this code is documented
2 manuals in the MyPros+ library document this code for Lennox air conditioner.
Models covered by the manuals that document this code
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