E18
SMEG
Temperature Calibration / Sensor Range Error
Display shows E18 and the refrigerator may show incorrect temperature readings or fail to reach setpoints.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
One or more NTC sensors drifting out of calibration, Poor sensor placement or contact, Firmware miscalibration, Intermittent wiring connections
How to Fix / Troubleshooting
Safety first: Unplug the appliance before accessing internal sensors or control boards.
E18 suggests that the control board is detecting inconsistent or out-of-range temperature sensor data.
- Step 1 – Verify with thermometer: Place an accurate fridge thermometer in both compartments to compare actual temperatures with displayed values.
- Step 2 – Inspect sensors: Check fridge, freezer, and evaporator sensors for secure mounting and good contact with surfaces. Reposition if loose.
- Step 3 – Check connectors: Reseat all sensor connectors at the main PCB to eliminate intermittent contacts.
- Step 4 – Replace suspect sensor: If one area shows large deviation from actual temperature, replace that compartment's NTC sensor with a SMEG-approved part.
- Step 5 – Control board calibration: If all sensors are new and wiring is sound but E18 persists, the main PCB may require replacement or firmware update by an authorised service centre.
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Repair Difficulty
Hard
4/5
Required Part
Temperature Sensor Set (NTC Probes)
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