Freezer displays E18; may indicate sensor short circuit

Safety first: Unplug the freezer before testing sensors.

• Identify which sensor: Refer to the tech sheet to see which sensor E18 refers to (evaporator, cabinet, or ambient).
• Inspect sensor and harness: Look for crushed or rubbed-through insulation causing wires to touch. Repair with heat-shrink tubing or replace the harness.
• Test thermistor: Disconnect and measure resistance. A reading near 0 Ω indicates a shorted sensor; replace it.
• Dry moisture: If condensation is present at the connector, dry thoroughly and apply dielectric grease to prevent recurrence.
• Replace control board: If sensor and wiring are good but E18 remains, the board input may be shorted internally and require replacement.