Bosch Refrigerator Error Code F52

F52 indicates that the finger protection sensor in the ice dispenser has produced an invalid reference measurement. Specifically, the signal recorded when the sensor LED is on is reading higher than the signal when the LED is off, which is the opposite of what the system expects. Bosch uses this sensor to detect obstructions in the dispenser chute, and when the reading is out of range, the system flags F52 and suspends dispenser operation.

A power reset may temporarily clear the F52 code, but if the underlying issue is a contaminated sensor slot, a loose connector at X504, or a faulty finger protection module, the error will return. Resolving the root cause before or after resetting is necessary for a lasting fix.

If the fix is simply cleaning the dispenser slot or reseating the plug at X504, there may be no parts cost at all. If the finger protection electronics module needs replacement, parts and labor costs typically range from around $150 to $350 depending on the specific model and the service provider. Diagnosing the exact failed component before ordering parts is recommended to avoid unnecessary expense.

Start by cleaning the ice dispenser slot thoroughly to remove any ice, moisture, or debris near the sensor window. Next, check plug X504 on the electronics module to make sure it is fully seated and free of corrosion. If the error persists after those steps, the finger protection electronics module should be inspected and likely replaced.

The F52 fault is directly tied to the finger protection system, which is designed to prevent injury from the ice dispenser mechanism. While the refrigerator itself will continue cooling, the dispenser may be disabled until the fault is resolved. Addressing the error promptly ensures the dispenser safety system is functioning correctly.