What Fault 7 Means
Fault 7 points to the defrost sensor specifically — a dedicated sensor, separate from the main compartment ones, that watches the evaporator during defrost — showing a resistance reading above 45,000 ohms. That open-circuit reading indicates a failed sensor or damaged wiring.
Common Causes of Fault 7
- The defrost sensor has failed
- Defrost sensor wiring that's damaged or disconnected
- Corrosion at the control-module connector
🔧 One Safe Check You Can Try
There's no homeowner-safe test here — confirming this reading takes a multimeter on a fully de-energized unit, which is technician work.
⚠ Why You Shouldn't Go Further Than That
- This sensor sits right at the evaporator, which is tied into refrigerant lines a homeowner shouldn't be disturbing.
- Swap the sensor without actually confirming the diagnosis and the underlying defrost-timing problem stays put, wasting the part while frost keeps accumulating.
- Pulling interior freezer panels exposes the evaporator fins, which fold over at a touch, and a flattened patch of fin cuts airflow across the whole coil.
- A sensor that goes back in even slightly out of position can keep reading wrong even with a brand-new part.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.