Summit digital freezer shows E2 and may run continuously or not cool properly.

Safety warning: Disconnect power before removing any interior panels. Sharp evaporator fins can cut skin; wear cut-resistant gloves.

Steps to address E2:

• Unplug the freezer and open the door fully.
• Access the evaporator area: Remove the interior rear panel of the freezer compartment (usually held by Phillips screws). Carefully pull the panel forward to expose the evaporator coil and fan.
• Locate the evaporator thermistor: It is typically clipped to the evaporator tubing or mounted near the coil, with two small wires leading to a connector.
• Inspect for damage: Look for broken insulation, cut wires, or a sensor that has come loose from the coil. Check for heavy ice buildup around the sensor.
• Defrost if necessary: If the coil and sensor are encased in ice, allow the unit to defrost fully (door open, towels at the base) or use a hair dryer on low, keeping it moving and away from plastic parts.
• Check the connector: Follow the thermistor wires to the plug. Disconnect and inspect for corrosion or loose pins. Reseat the connector firmly.
• Test the thermistor: With a multimeter, measure resistance across the sensor leads. Compare to expected values (NTC type; typically several kΩ at room temperature). Replace if open, shorted, or far out of range.
• Replace the evaporator thermistor: If faulty, install a Summit-compatible evaporator sensor. Clip it securely to the same tubing location to ensure proper temperature sensing. Route wires away from the fan blade and sharp metal.
• Reassemble and test: Reinstall the interior panel, plug the freezer back in, and verify that the E2 code clears within several minutes. Monitor for proper cooling and normal defrost cycles over 24 hours.

Note: If E2 persists with a known-good sensor and wiring, the electronic control board is likely defective and should be evaluated by a professional.