Washer will not start or stops with F05; may also show water level issues such as overfilling or not filling enough.

Safety First: Unplug the washer and shut off both hot and cold water supply valves.

Steps (temperature-sensor models):

• Access heater/NTC: Remove rear panel. Locate the heater element at the bottom of the tub; the NTC sensor is usually clipped into or near the heater bracket.
• Check wiring: Inspect the harness from the NTC to the main control for pinched or broken wires and loose connectors. Reseat connectors.
• Test NTC: With a multimeter, measure resistance across the NTC terminals. Typical values are 10–20 kΩ at room temperature (check service manual for your model). Replace if open or shorted.

Steps (pressure-switch models):

• Access pressure switch: Remove top panel. Locate the round plastic pressure switch with a small rubber hose attached.
• Inspect hose: Remove the hose and blow through it to ensure it is clear. Check for cracks or water in the hose and replace if damaged.
• Check air dome: At the tub connection, ensure the air dome port is not clogged with detergent residue.
• Reseat connectors: Unplug and reconnect the pressure switch wiring harness.

Test: Reassemble, restore power, and run a quick wash. If F05 persists after verifying sensor and hose, the main control may be misreading the signal and require replacement.