Bosch Refrigerator Error Code EF

The EF error code on a Bosch refrigerator indicates a flow sensor fault during water dispensing or ice making. The flow sensor monitors water movement through the supply line by generating electrical pulse signals as water passes through a turbine or paddle mechanism inside the sensor body. Under normal operation, the sensor produces 10 or more pulse signals per second while water is flowing. When the pulse count drops below this threshold during an active water supply cycle, the control board registers the EF code and halts the water supply function to prevent potential overflow or dry cycling of downstream components.

The flow sensor is positioned along the water supply path, typically between the inlet valve and the dispenser or ice maker. Its job is to confirm that water is actually moving through the system at an adequate rate. If the sensor detects fewer than 10 pulses per second, the control board interprets this as either no flow or insufficient flow, which can result from a restricted supply line, a failed inlet valve, a clogged water filter, low household water pressure, or a defective flow sensor itself.

Begin diagnosis at the water supply line, as this is the most common and easily resolved cause. Verify the shutoff valve behind the refrigerator is fully open, check for kinks in the supply tubing, and confirm the household water pressure is adequate. If supply conditions are confirmed normal, the next steps involve inspecting the water filter, the inlet valve solenoid, and finally testing or replacing the flow sensor.