Electrolux Refrigerator Error Code SH (FZ)

SH (FZ) means the refrigerator's control board has detected a short circuit in the freezer cavity thermistor circuit. The thermistor is a temperature-sensing resistor, and a shorted condition causes it to send an invalid signal to the control board. This prevents accurate temperature monitoring and can disrupt normal cooling cycles. The fault points to the thermistor itself, its wiring, or the connector in the freezer compartment.

The error is not a safety hazard in the sense of fire or electrical danger, but it does mean the freezer temperature is not being properly monitored or regulated. Food stored in the freezer may not be maintained at safe temperatures while the fault is active. It is advisable to address the fault promptly and check the condition of frozen food until the repair is complete.

If only the thermistor requires replacement, parts costs are typically in the range of $15 to $50 depending on the specific model, with professional labor adding $75 to $150 or more. If the wiring harness is damaged, repair costs will be higher depending on the extent of the damage. A full control board replacement, if required, can bring total repair costs to $200 to $400 or beyond when including labor.

A knowledgeable DIYer can begin by inspecting the thermistor wiring harness and connector for visible damage, pinching, or moisture and reconnecting any loose connections. Testing the thermistor resistance with a multimeter after disconnecting it from the circuit is a reliable way to confirm or rule out a failed sensor. If the thermistor or wiring is damaged, replacing the component is typically straightforward, though accessing it may require partial disassembly of the freezer interior panels.

A reset may temporarily clear the error code from the display, but the fault will return if the underlying short circuit in the thermistor circuit has not been corrected. Resetting without repairing the cause does not restore proper temperature sensing. A proper repair requires diagnosing and fixing the shorted thermistor or wiring before the error will stay cleared.