Error Code E33

Washing Machine Error Code E33: Water Level Sensor Problem

Has your Midea, LiddleSwan, or Zanussi washing machine displayed error code E33? This means the washing machine has detected a critical error related to the monitoring of the water level inside the drum. The water level sensor (often a pressure switch or hydrostat) is reporting a reading that is outside the normal, expected parameters for the current cycle phase. This could mean the machine is overfilling, underfilling, or that the sensor component itself is failing or miscommunicating with the main control board.

What to do:

• Check the water hose: Before investigating internal components, start with the external supply. Ensure the main water inlet hose connecting the machine to the wall faucet is straight and free of any sharp bends or kinks, especially behind the appliance where it is easily compressed. A blockage or kink can severely restrict the water supply, preventing the machine from filling adequately within the allotted time, which can confuse the sensor and trigger the E33 error. Inspect the filter screens located inside the inlet valves (where the hose connects to the back of the washing machine) for any debris or sediment buildup that may be restricting flow.
• Check the water supply: Confirm that the domestic water supply pressure is adequate. Ensure the water tap supplying the washing machine is fully open and delivering full pressure. If the water pressure in your home is generally low, or if multiple appliances (like showers or dishwashers) are running simultaneously, the washing machine may not fill fast enough, leading the control system to log an E33 error due to an unexpected level reading. If the machine is connected to both hot and cold taps, check both supplies.
• Check the sensor: (For advanced users only! Proceed with extreme caution and ensure the appliance is unplugged.) If you are technically inclined and comfortable working with internal appliance components, you may inspect the area where the water level sensor (pressure switch) is located. This component is typically situated near the top of the wash tub and often connects via a small air tube (pressure hose). Check for visible issues such as:
  • A disconnected or damaged air tube leading from the wash tub (pressure trap) to the sensor.
  • Visible corrosion or loose wiring connectors leading to the sensor component. However, replacing or calibrating this sensor requires specific technical knowledge and diagnostic equipment. Attempting repairs without proper training involves the risk of electric shock and will usually void any existing manufacturer’s warranty.
• Call a technician: In most cases involving sensor errors like E33, it is highly recommended to call a qualified appliance technician specializing in Midea, LiddleSwan, or Zanussi repairs. They have the specialized tools required to test the electrical continuity and resistance values of the pressure sensor and associated wiring harness. A faulty sensor is rarely repairable and must typically be replaced. Furthermore, if the sensor is functional but the error persists, the issue may lie with the main control board (PCB), a complex component that only a professional should diagnose and replace. Relying on a technician ensures the correct part is installed and properly calibrated for safe and effective machine operation.