Freezer shows H02 and interior temperature rises above setpoint

Safety: Unplug the freezer before accessing internal panels or the control board.

Steps:

• 1. Locate the freezer sensor: The Panasonic freezer thermistor is usually clipped to the evaporator cover or mounted on the liner wall behind a small plastic cover. Remove the inner panel or cover carefully.
• 2. Visual inspection: Check the sensor body and wiring for cuts, ice damage, or corrosion. Ensure the sensor is firmly clipped in place and not hanging loose.
• 3. Connector check: Trace the sensor harness to the top or rear where it connects to the main control PCB. Reseat the connector and check for corrosion or bent pins.
• 4. Resistance test (if equipped): With the sensor disconnected and at room temperature, measure resistance with a multimeter. Panasonic NTC thermistors typically read in the 5–20 kΩ range at room temperature. A reading of 0 Ω (short) or OL (open) indicates a bad sensor.
• 5. Replace sensor if faulty: Order the exact Panasonic freezer thermistor for your model. Clip the new sensor in the same location and route the harness along the original path to avoid contact with moving parts or sharp edges.
• 6. If sensor tests normal: The fault may be in the main control PCB A board. Inspect for burnt components; replacement should be done by a qualified technician.