Lennox Air Conditioner Error Code E345
The 'O' relay on the outdoor board has failed - either the pilot relay contacts did not close, the relay coil did not energize, or the confirmation circuit is not sensing properly.
SourceLennox Air Conditioner - Service Manual: Elite Series XC20p. 31
The full E345 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. 31
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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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