What Fault 3 Means
Fault 3 means the main compartment temperature sensors are showing a resistance reading above 45,000 ohms — an open-circuit reading that tells the control board the sensor or its wiring has failed, not that there's an actual temperature problem.
Common Causes of Fault 3
- The temperature sensor has failed or become disconnected
- Damaged sensor wiring creating an open-circuit condition
- A corroded connector at the control module
🔧 One Safe Check You Can Try
This isn't a check to do yourself — confirming the sensor's resistance needs a multimeter applied to a fully de-energized unit, which is technician-level work.
⚠ Why You Shouldn't Go Further Than That
- Because the sensor circuit shares wiring with the compressor control system, probing the wrong wire while troubleshooting can set off a bigger fault.
- Swap the sensor on a wrong diagnosis and the fridge keeps running with unreliable temperature control for that much longer, putting the food inside at risk.
- Sensor housings often sit close to refrigerant lines, so damaging one while reaching in can create an expensive leak.
- A connector refitted incorrectly can produce an entirely different, more confusing fault on the next check.
- Opening interior panels to get at the sensor wiring generally forfeits whatever warranty remains on the unit.