Hotpoint Refrigerator Error Code SF

The SF code indicates a freezer thermistor failure. The thermistor is the temperature sensor inside the freezer compartment, and the control board has detected its resistance is outside the acceptable range of 500 ohms to 110 kilohms. The refrigerator will continue running at default parameters, but precise temperature control is disabled until the fault is resolved.

Yes, the appliance is designed to remain operational when the SF code is active by running at default set parameters. However, because actual freezer temperatures are no longer being measured and adjusted precisely, it is a good idea to use a standalone thermometer to verify that your freezer is maintaining a safe temperature, typically at or below 0 degrees Fahrenheit. Prolonged operation in this state without repair is not recommended.

A power reset may temporarily clear the SF code, but it will return as soon as the control board re-reads the thermistor and detects the out-of-range resistance. The underlying fault with the sensor, wiring, or connections must be diagnosed and corrected to permanently clear the code. Resetting without repair is not a solution and could result in temperature control issues continuing undetected.

A knowledgeable DIYer can start by using a multimeter to test the thermistor's resistance and checking the wiring harness and connectors for damage or loose connections. If the thermistor resistance reads above 110 kilohms or below 500 ohms, the sensor needs to be replaced. Wiring repairs and sensor replacement are generally straightforward tasks, but if the control board is suspected, professional diagnosis is recommended.

If only the thermistor needs replacement, parts typically cost in the range of $10 to $40, and the repair is relatively simple. If professional labor is required, total repair costs generally fall between $100 and $250 depending on your location and the service provider. A control board replacement, if needed, would add significantly more to the cost.