Error code reference
Lennox Air Conditioner Error Code E433
The inverter has detected a compressor over-current condition (peak phase current greater than 28A) (inverter…
The inverter has detected a compressor over-current condition (peak phase current greater than 28A) (inverter code 29).
First step from the service manual
Disconnect power to outdoor unit and restart.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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- 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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