“F3” fault code appears; Gladiator freezer may show erratic or no temperature reading.

Safety First: Unplug the freezer before accessing internal wiring or sensors.

• Step 1 – Locate the indicated sensor: Refer to the tech sheet to identify which thermistor F3 refers to (often the main freezer sensor).
• Step 2 – Check connections: Ensure the thermistor plug is fully seated at both ends. Clean any corrosion with contact cleaner.
• Step 3 – Continuity test: Disconnect the harness and check continuity from sensor to board. Repair or replace any open wiring.
• Step 4 – Replace thermistor: If wiring is intact but F3 persists, install a new freezer thermistor.