Haier Refrigerator Error Code 1st LED Freezer flash

The 1st LED Freezer flash indicates a Freezer Sensor (F SNR) error. The thermistor sensor located on the side wall of the freezer compartment has either failed or is sending a signal outside the expected range. The control board cannot properly monitor freezer temperature until the issue is resolved.

Operating the refrigerator with an active freezer sensor error is not recommended for extended periods. Without accurate temperature feedback, the control board cannot properly regulate freezer temperatures, which means food stored in the freezer may not stay at a safe temperature. It is best to address the fault promptly and transfer frozen food to a backup unit if repair will be delayed.

A power reset, such as unplugging the refrigerator for a few minutes and restoring power, may temporarily clear the error display. However, if the underlying cause is a physically failed sensor or damaged wiring, the error will return once the control board runs its diagnostics again. A reset alone is not a fix and should only be used as a step to confirm whether the fault is intermittent or persistent.

A knowledgeable DIYer can check the sensor's wiring harness connector for looseness and inspect the wiring for visible damage. Testing the thermistor with a multimeter to check its resistance is also within reach for someone comfortable with basic electrical testing. However, replacing the sensor or control board may require access to internal components and some disassembly of the freezer liner or panel.

Repair costs depend on which component has failed. A replacement freezer thermistor sensor is typically an inexpensive part, with the sensor itself usually ranging from $10 to $40. If the main control board is at fault, parts alone can range from $80 to $200 or more. Adding a service call and labor, total repair costs can range from $100 to $350 depending on the diagnosis.