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.
The high pressure switch has opened 5 times within one hour, locking out the outdoor unit.
First step from the service manual
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.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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Get the full diagnostic procedure for E413.
- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
- Verified part numbers when replacement is required
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