Safety First: Disconnect power before accessing any internal components.

H2 typically indicates a problem with the ambient (room) temperature sensor used by the control to regulate operation.

Step 1 – Confirm environment: Ensure the freezer is installed in a location within the recommended ambient temperature range (usually 55–110°F). Extreme cold or heat can trigger sensor-related issues.
Step 2 – Locate ambient sensor: On many Frigidaire freezers, the ambient sensor is located behind the front grille, near the control housing, or in the machine compartment. Refer to the tech sheet if available.
Step 3 – Inspect and reseat: Check the sensor body and wiring for damage. Unplug and replug the connector to clear oxidation.
Step 4 – Test sensor resistance: With the sensor disconnected, measure resistance at room temperature. Compare to expected values (often ~10kΩ at 77°F). Replace if reading is open, shorted, or far out of range.
Step 5 – Check wiring to board: Verify continuity from the sensor connector to the control board. Repair any broken or shorted wires.
Step 6 – Replace control board if needed: If sensor and wiring are good but H2 remains, replace the electronic control board.

Display shows H2 and freezer temperature reading is inaccurate or unit runs continuously.

Possible Causes