Bosch Refrigerator Error Code Er F1

Er F1 indicates a detected interruption or short-circuit in the freezer compartment temperature sensor circuit. The control module is not receiving a valid signal from the NTC thermistor used to monitor freezer temperature. This can prevent the refrigerator from maintaining proper freezer temperatures until the fault is resolved.

A power reset may temporarily clear the Er F1 code, but it will return if the underlying sensor or wiring fault is still present. Resetting is useful for ruling out a one-time electronic glitch, but a persistent Er F1 after reset indicates a hardware fault that requires proper diagnosis and repair.

Repair costs depend on which component has failed. A replacement freezer NTC sensor typically costs between $15 and $60 for the part, while a new control module can range from $100 to $300 or more. Adding professional labor, total repair costs generally fall between $100 and $400 depending on the diagnosis and your location.

A knowledgeable DIYer can check for loose or corroded connector terminals at the freezer sensor and inspect the wiring harness for visible damage. Testing the sensor's resistance with a multimeter is also within reach if you are comfortable with basic electrical diagnostics. However, replacing the control module or tracing complex wiring faults is generally better handled by a qualified appliance technician.

When Er F1 is active, the control board cannot reliably monitor freezer temperature, which means the freezer may not cool adequately or may operate erratically. Food stored in the freezer could be at risk if the fault persists. It is advisable to address the error promptly and avoid storing temperature-sensitive items in the freezer until the repair is complete.