How to Fix / Troubleshooting

Safety: Disconnect power before handling wiring or sensors.

Locate the thermistor: The evaporator thermistor is usually clipped to the evaporator plate or tubing. Carefully remove any covers to access it.
Inspect wiring: Follow the thermistor leads back to the control board. Look for cuts, pinched sections, or signs of moisture ingress.
Test the thermistor: Disconnect the thermistor from the harness and measure its resistance with a multimeter. Compare the reading to the Fagor service chart for the current temperature. A reading of 0 Ω (short) or infinite (open) indicates a bad sensor.
Check connectors: Clean any corroded pins with contact cleaner and reseat the plug firmly.
Replace if faulty: Install a new evaporator thermistor of the correct specification and route the wiring away from hot or moving parts.

Clear the error by disconnecting power for a few minutes, then restore power and test operation.

Evaporator temperature sensor error; unit stops and displays sensor fault.

Possible Causes