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Error code reference

Frigidaire Refrigerator Error Code SH

Flashing display indicating a potential operating problem detected by the electronic control system.

Frigidaire codesFrigidaire refrigerator codes

Flashing display indicating a potential operating problem detected by the electronic control system.

First step from the service manual

Contact authorized service representative to interpret the flashing message.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What SH means on a Frigidaire refrigerator

The SH error code indicates the control board has detected a short circuit condition in the fresh food (FF) thermistor circuit. A shorted thermistor produces a resistance value that falls below the acceptable range the control board expects, signaling that the sensor has failed in a way that pulls the circuit low rather than leaving it open. This is distinct from an open thermistor fault and specifically appears on the fresh food compartment display while the freezer display remains blank. The FF thermistor is the temperature sensor mounted inside the fresh food section that continuously reports compartment temperature to the control board.

For homeowners, this means the refrigerator's brain has lost its ability to accurately read the temperature inside the fresh food section. Without a reliable temperature reading, the control board cannot properly regulate cooling cycles for that compartment. Your food may still be cooling, but the refrigerator is operating blind in the fresh food section, which can lead to overcooling, undercooling, or erratic compressor behavior depending on how the unit handles the fault.

The most common sources of this fault are a failed thermistor, damaged wiring between the sensor and control board, or a corroded or shorted connector. The thermistor itself is the most frequent culprit, as these sensors can fail internally and present as a short rather than an open circuit.

Source: manufacturer service documentation.

Common causes of SH

  1. 01

    Failed FF thermistor (internal short)

    Part replacement

    The fresh food thermistor has failed internally, causing its resistance to drop below the minimum threshold the control board accepts. This is the most common cause of the SH code and requires replacing the thermistor.

  2. 02

    Shorted wiring harness between FF thermistor and control board

    Part replacement

    The wiring that runs from the FF thermistor to the control board has developed a short, typically from two conductors contacting each other or a conductor touching a grounded metal surface. This can result from pinched wires, insulation wear, or damage during a prior repair.

  3. 03

    Corroded or shorted thermistor connector

    Wiring / connection

    The connector joining the thermistor to the wiring harness can accumulate moisture and corrosion, causing the pins to short together. Inspecting and cleaning the connector, or replacing it, may resolve the fault without replacing the thermistor itself.

  4. 04

    Failed main control board

    Part replacement

    If the thermistor and all associated wiring check out within spec, the control board's thermistor input circuit may have failed internally and is misreading the sensor signal as a short. This is the least likely cause and should only be considered after confirming the thermistor and wiring are not at fault.

See the test procedure for each cause

Frequently asked questions about SH

What does the SH error code mean on a Frigidaire refrigerator?
SH stands for a shorted FF thermistor. The fresh food compartment temperature sensor has failed or its circuit has shorted, sending a resistance value to the control board that falls below the acceptable range. The code appears on the fresh food display while the freezer display goes blank. The refrigerator detects this as a sensor failure rather than a normal temperature reading.
How do I fix the SH error code on my Frigidaire refrigerator?
Start by locating the fresh food thermistor, typically clipped to an evaporator cover or interior wall in the fresh food section. Disconnect the thermistor and measure its resistance with a multimeter at room temperature. Most Frigidaire FF thermistors should read approximately 5,000 to 20,000 ohms depending on ambient temperature. A reading near zero or a dead short confirms the thermistor has failed and needs replacement. Also inspect the wiring harness and connector for pinched or corroded wires before ordering parts.
Is it safe to keep using my refrigerator with the SH code showing?
Short-term use is possible, but not advisable for extended periods. With the FF thermistor shorted, the control board cannot accurately monitor fresh food compartment temperature, which means your refrigerator may overcool or undercool that section. Perishable foods are at risk, and prolonged operation without a working temperature sensor can cause the compressor and sealed system to run outside normal parameters. Address this repair as soon as possible rather than relying on the unit to maintain safe food temperatures.
How much does it cost to repair the SH error code on a Frigidaire refrigerator?
If the fix is a thermistor replacement, the part itself typically costs between $15 and $40 depending on the model. A wiring harness or connector repair may cost similarly for parts. If you are comfortable with basic appliance repair, this is a moderately accessible DIY repair. Professional labor for a thermistor replacement typically runs $100 to $200 including the service call, though that varies by region and service provider. Control board replacement is more expensive, ranging from $150 to $350 in parts alone.
Why is only my fresh food display showing SH while the freezer display is blank on my Frigidaire?
This is the expected behavior for the SH code. The fault is specific to the fresh food thermistor circuit, so the error displays on the FF display. The freezer display going blank is part of how Frigidaire presents this particular fault, not an additional problem. The freezer section has its own separate thermistor, and if the freezer display were showing a code, that would indicate a separate fault in the freezer sensor circuit.

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