Access our premium database of error codes, common faults, and professional repair solutions for Schulthess appliances.
Schulthess I10: Water inlet / filling timeout in Dishwasher; appliance fails to fill to minimum operational level.
The dishwasher is not filling with water. The water tap is closed, inlet hose is kinked, or the inlet valve filter is blocked.
Check that the water supply is turned on. Ensure the inlet hose is not bent. Clean the mesh filter at the hose connection point.
Schulthess I20: Water drainage failure detected in Dishwasher; drain pump cannot evacuate water within safety time limit.
Water is not draining from the appliance. The filters are blocked, the drain hose is kinked, or the drain pump is jammed.
Remove and clean all filters in the bottom of the dishwasher. Check the drain hose for obstructions. Inspect the drain pump impeller for debris.
Anti-flood system activated
A leak has been detected, and water has collected in the base of the dishwasher, activating the safety float switch.
Turn off water and power. Find and repair the source of the leak. Drain the base pan to reset the float switch.
Water level sensor malfunction
The pressure sensor is giving an incorrect reading, leading to either too much or too little water in the tub.
Clean the filters and sump area thoroughly, as blockage can affect the sensor's reading. If the issue persists, the sensor may need replacement.
Wash pump / Circulation motor fault
The main circulation pump motor has a problem, such as a seized bearing, a faulty start capacitor, or a motor control board issue.
Check if the wash pump impeller can be turned by hand. Check the start capacitor (if present). Test the motor windings and control board.
Heating problem / Overheating
The water is not heating, or it is overheating. This can be caused by a faulty heating element, NTC sensor, or a relay on the main board.
Test the heating element and NTC sensor for correct resistance values. Inspect the main board for any signs of burned components on the heater circuit.
NTC temperature sensor fault
The NTC thermistor that measures water temperature is faulty (open or short circuit).
Locate the NTC sensor and test its resistance. The resistance should change predictably with temperature. Replace if faulty.
Schulthess I80: Motor drive or inverter rotation anomaly in Dishwasher; drum/motor fails to spin at target RPM.
On models with alternating spray arms, the diverter valve that directs water to the upper or lower arm is stuck or faulty.
Check the diverter motor and mechanism for blockages or damage. Test the motor and its wiring.
Control board configuration error
There is a communication or configuration data (EEPROM) error on the main control board.
Attempt a hard reset by disconnecting power for 15-30 minutes. If the error persists, the control board is likely faulty and needs replacement.
Schulthess IA0: Operational cycle fault detected during Dishwasher program execution.
The sensor that measures how dirty the water is has failed, which can affect automatic programs.
Clean the sensor lens, which is typically located in the sump area. If cleaning doesn't help, the sensor may need to be replaced.
Schulthess IC0: Operational cycle fault detected during Dishwasher program execution.
The main control board cannot communicate with the user interface or display panel.
Check the wiring harness and connectors between the main control unit (usually in the base) and the display board in the door. Reseat connectors.
Schulthess IF0: Water level pressure sensor/switch frequency anomaly detected in Dishwasher.
The machine has taken in too much water due to a faulty inlet valve or a blocked pressure sensor system.
Turn off water supply immediately. Check the water inlet valve to see if it is stuck open. Inspect the pressure sensor and its chamber for blockages.
Display shows 'Tap Closed' message
The appliance is not detecting incoming water. The water supply tap is off, the hose is kinked, or the inlet filter is blocked.
Ensure the water tap is fully open. Straighten the inlet hose. Unscrew the hose from the machine and clean the small mesh filter inside the inlet valve.
Reminder light or message to clean the filter is on
The lint filter is full of fluff, which obstructs airflow and reduces drying performance.
Open the door, remove the one or two parts of the fluff filter, and clean all lint off by hand. Reassemble and insert back into the machine.
Indicator for cleaning the heat exchanger is lit
The heat exchanger (condenser unit) at the bottom of the dryer is clogged with lint, affecting efficiency.
Open the flap at the bottom of the dryer. Release the locks and remove the heat exchanger. Rinse it thoroughly under a tap and allow it to dry before reinstalling.
Indicator light for the water container is on and the dryer stops
The condensate water container is full and needs to be emptied.
Slide out the water container, empty it into a sink, and slide it back into place firmly.
Display shows 'Pump Blocked' message
The drain pump filter or the pump itself is clogged with lint, coins, or other debris, preventing water from draining.
Access the drain pump through the small door at the bottom of the machine. Carefully unscrew the filter, clean it and the pump chamber, then refit.
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