F1 flashes and the unit will not start; audible click from inside when pressing the power button.

Safety first: Unplug the carpet cleaner before removing covers. High voltages are present on the relay and motor circuits.

• Check for obstructions: Ensure the brush head and suction path are clear so the motor is not mechanically stalled.
• Inspect motor connectors (advanced): Remove the housing to access the main motor. Check that the spade connectors are tight and that there are no signs of overheating.
• Listen for relay: When you press power (briefly plug in and test), you may hear a click from the relay but no motor spin. This often indicates burnt relay contacts or a failed motor.
• Professional repair: Replacing the motor relay on the PCB or the main suction motor requires soldering and electrical safety knowledge. Have a qualified technician perform this repair.