Digital Danby upright freezer beeps and displays E1; temperature reading may be blank or flashing.

Safety first: Unplug the freezer before removing any panels. Use a non-contact voltage tester if available.

Steps to check and address E1:

• Power reset: Unplug the freezer for 5 minutes, then plug it back in. If E1 returns, continue.
• Locate the cabinet sensor: On most Danby uprights, the cabinet temperature sensor is behind the interior rear liner or clipped to the evaporator tubing. Look for a small probe with two wires leading to the control.
• Inspect wiring: Check the sensor wires for cuts, pinches, or rodent damage. Ensure the connector at the control board is fully seated and not corroded.
• Test the sensor: With the unit unplugged, disconnect the sensor and measure resistance with a multimeter. At room temperature (around 77°F / 25°C), most Danby NTC sensors read roughly 5k–10k ohms. A reading of 0 ohms (short) or infinite (open) indicates a bad sensor.
• Replace if faulty: If readings are out of range, replace the cabinet temperature sensor (NTC probe). Route the new sensor along the original path and secure it away from moving parts or sharp edges.
• Check the control board: If a known-good sensor still triggers E1, the main control board sensor circuit may be defective and should be replaced.

When to call a technician: If you are not comfortable removing interior panels or testing resistance, or if the control board needs replacement, contact a qualified appliance technician.