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Error code reference
Lennox Air Conditioner Error Code E413
The high pressure switch has opened 5 times within one hour, locking out the outdoor unit.
SourceLennox Air Conditioner - Service Manual: Elite Series XC20p. 31
Diagnostic procedure
The full E413 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.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Confirm system is properly charged with refrigerant. Check condenser fan motor, clogged TXV, blockage to indoor unit blower motor, stuck reversing valve or clogged refrigerant filter. Clear after a power reset.
SourceLennox Air Conditioner - Service Manual: Elite Series XC20p. 31
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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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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