“F1” fault code appears; Gladiator freezer may shut down or run continuously.

Safety First: Unplug the freezer before removing the control housing or thermostat. Use insulated tools.

• Step 1 – Identify control type: Determine if your Gladiator freezer uses a mechanical thermostat knob or an electronic control panel.
• Step 2 – Mechanical thermostat test: Bypass test (advanced): With power disconnected, remove the cold control thermostat and temporarily join the two main thermostat wires with an insulated jumper. Restore power briefly; if the compressor now runs normally, the thermostat is faulty and should be replaced. Remove jumper after test.
• Step 3 – Electronic control: For electronic models, verify sensor connections and inspect the control board for damage. If F1 persists, replace the electronic control board.