Viking ice maker displays E1 and stops making ice

Safety first: Unplug the ice maker or switch off the circuit breaker before accessing internal components. Sharp metal edges are present; wear cut-resistant gloves.

• Step 1 – Power reset: Disconnect power for 5 minutes, then restore. If E1 returns immediately, proceed with sensor checks.
• Step 2 – Locate evaporator thermistor: Remove the front kick plate and, if needed, the side or top panel to access the evaporator area. The thermistor is usually a small probe clipped to the evaporator plate or tubing with two wires leading to the control board.
• Step 3 – Inspect connections: Check the thermistor plug at the control board for corrosion, looseness, or broken pins. Reseat the connector firmly.
• Step 4 – Test thermistor resistance: With power off, disconnect the thermistor and measure resistance with a multimeter. Compare to Viking’s temperature/resistance chart (commonly 5–50 kΩ depending on temperature). An open (OL) or 0 Ω reading indicates a bad sensor.
• Step 5 – Replace thermistor if defective: Remove the clip, gently pull the sensor out, route the new thermistor harness along the same path, and reconnect to the control board. Avoid kinking or pinching the wires.
• Step 6 – If thermistor tests good: The fault may be in the main control board’s sensor circuit. Inspect for burnt components or corrosion. Replacement of the control board is typically required if the board cannot read a known-good sensor.

After replacement, restore power and run a full ice-making cycle to confirm the E1 code is cleared.