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Error code reference

Haier Refrigerator Error Code F7

Icemaker sensor malfunction

Haier codesHaier refrigerator codes

Icemaker sensor malfunction - ICE SNR short circuit or open circuit.

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What F7 means on a Haier refrigerator

The F7 error code on a Haier refrigerator indicates a malfunction with the icemaker temperature sensor, also referred to as the ICE SNR. This sensor monitors the temperature within the icemaker assembly to regulate the ice-making cycle. The control board triggers F7 when it detects that the sensor circuit has either shorted out or opened completely, meaning the signal returning from the sensor is either zero or out of the expected resistance range. Both a short circuit and an open circuit prevent the board from receiving accurate temperature data, causing the icemaker to halt operation and log the fault.

The icemaker sensor is a thermistor, a resistive component whose resistance changes predictably with temperature. Under normal operating conditions, the thermistor should return a resistance value within a specific range that corresponds to the icemaker compartment temperature. A short circuit drives resistance abnormally low, while an open circuit drives it abnormally high or removes the signal entirely. Either condition tells the control board that the sensor reading is implausible, prompting the F7 code.

Common causes include a damaged sensor probe, wiring harness failures such as frayed or pinched wires between the sensor and the control board, and corroded or loose connector terminals. In some cases the sensor itself has failed internally due to age or moisture exposure. Physical damage to the icemaker assembly during cleaning or ice removal can also sever sensor wiring, producing an open circuit condition.

Source: manufacturer service documentation.

Common causes of F7

  1. 01

    Failed icemaker thermistor

    Part replacement

    The thermistor sensor itself has failed internally, producing either no signal or an out-of-range resistance reading. This is the most frequent cause and can be confirmed by disconnecting the sensor and checking its resistance with a multimeter.

  2. 02

    Open or broken wiring harness

    Wiring / connection

    A wire in the harness connecting the icemaker sensor to the control board has broken or become disconnected, creating an open circuit. Inspect the harness visually for pinched, frayed, or severed wires, particularly near the icemaker housing where movement occurs.

  3. 03

    Corroded or loose connector terminals

    Wiring / connection

    Moisture in the freezer compartment can corrode the connector pins between the sensor harness and the control board, increasing resistance or breaking continuity entirely. Clean or replace the connector if corrosion or looseness is found.

  4. 04

    Short circuit in sensor wiring

    Wiring / connection

    Two wires in the sensor circuit may be touching due to damaged insulation, creating a short that drives the resistance reading abnormally low. Inspect the full length of the sensor wiring for damaged insulation or areas where wires are pinched against metal edges.

  5. 05

    Faulty main control board

    Part replacement

    If the sensor and all wiring check out correctly with a multimeter, the control board circuit responsible for reading the sensor signal may have failed. This is the least common cause and should only be considered after all wiring and sensor tests are completed.

See the test procedure for each cause

Frequently asked questions about F7

What does F7 mean on a Haier refrigerator?
F7 on a Haier refrigerator indicates a fault with the icemaker temperature sensor, specifically a short circuit or open circuit in the ICE SNR circuit. The control board cannot receive a valid temperature reading from the icemaker sensor, so it shuts down the icemaker and displays the code. The underlying issue can be a failed sensor, damaged wiring, or a bad connector.
Can I fix the F7 error on my Haier refrigerator myself?
A knowledgeable DIYer can address this fault by inspecting the sensor wiring harness and connector terminals for visible damage, corrosion, or loose connections. Testing the icemaker thermistor with a multimeter will confirm whether the sensor itself has failed. If the sensor or wiring needs replacement, the repair is generally straightforward, though accessing the icemaker assembly requires removing the freezer drawer or shelving.
Is it safe to keep using my refrigerator when F7 is displayed?
The refrigerator and freezer compartments will continue to cool normally when F7 is active, so food safety is not immediately compromised. However, the icemaker will not produce ice until the sensor fault is resolved. It is best to address the repair promptly to restore full function and prevent any secondary issues.
How much does it cost to repair an F7 error on a Haier refrigerator?
If only the icemaker thermistor sensor needs replacement, parts typically cost in the range of $15 to $50 depending on the model. If a professional technician is needed for diagnosis and repair, total service costs can range from $100 to $250. Replacing the main control board, if required, will increase costs significantly.
Will resetting my Haier refrigerator clear the F7 error code?
A power reset, performed by unplugging the refrigerator for a few minutes and restoring power, may temporarily clear the F7 display. However, if the underlying sensor fault still exists, the code will return once the control board performs its next diagnostic check. A lasting repair requires correcting the wiring or replacing the failed sensor component.

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