mypros+
Error code reference

Jenn-Air Refrigerator Error Code SH

Shorted thermistor input detected during diagnostic service test.

Jenn-Air codesJenn-Air refrigerator codes

Shorted thermistor input detected during diagnostic service test.

First step from the service manual

Measure thermistor ohms at the specified connector with JP2 removed; if open or short circuit, check thermistor part at terminals in the compartment; if part is good, debug wire harness.

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

MyPros+ Max

Get the full diagnostic procedure for SH.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What SH means on a Jenn-Air refrigerator

The SH error code on a Jenn-Air refrigerator indicates that a shorted thermistor input was detected during a diagnostic service test. A thermistor is a temperature-sensitive resistor used by the refrigerator's control board to monitor temperatures inside the fresh food and freezer compartments. When the control board reads an abnormally low resistance value at a thermistor input, it interprets this as a short circuit condition and triggers the SH code. A shorted thermistor will cause the control board to receive inaccurate temperature data, which can lead to improper cooling cycles or compressor behavior.

The diagnostic process begins by removing connector JP2 and measuring the thermistor's resistance in ohms at the specified connector. A properly functioning thermistor will read within its normal resistance range at a given temperature. If the measurement shows an open or short circuit, the next step is to test the thermistor component itself at its terminals inside the compartment. This isolates whether the fault lies with the thermistor sensor itself or with the wiring between the sensor and the control board.

If the thermistor tests within normal parameters at its compartment terminals, the fault is located in the wire harness running between the thermistor and the control board connector. Damaged insulation, pinched wires, or corroded terminals in the harness can create a short circuit that mimics a failed thermistor. Careful visual inspection and continuity testing of the harness are required to isolate the exact failure point before replacing any components.

Source: manufacturer service documentation.

Common causes of SH

  1. 01

    Failed thermistor sensor

    Part replacement

    The thermistor itself has developed an internal short circuit, causing it to send an out-of-range resistance reading to the control board. Testing the sensor at its compartment terminals will show a short or near-zero ohm reading if the component has failed.

  2. 02

    Damaged wire harness

    Part replacement

    The wiring between the thermistor and the control board connector may have pinched insulation, a chafed wire, or bare conductors contacting each other or a grounded surface. If the thermistor tests good at its own terminals, the harness is the likely culprit.

  3. 03

    Corroded or contaminated connector terminals

    Wiring / connection

    Moisture or debris at the JP2 connector or the thermistor compartment terminals can create a conductive path that reads as a short circuit. Inspect all terminals for corrosion, moisture, or physical damage before replacing components.

  4. 04

    Faulty control board thermistor input

    Part replacement

    In less common cases, the input circuit on the control board itself may be shorted internally, causing it to read a short even when the thermistor and harness are both good. This is typically diagnosed only after confirming all other components test correctly.

See the test procedure for each cause

Frequently asked questions about SH

What does SH mean on a Jenn-Air refrigerator?
The SH code on a Jenn-Air refrigerator means the control board detected a shorted thermistor input during a diagnostic service test. A thermistor is a temperature sensor that the board uses to monitor compartment temperatures. When the board reads an abnormally low resistance at a thermistor input, it logs the SH fault. The problem may be the thermistor sensor itself, the wiring harness, or corroded connector terminals.
Can I fix the SH error code myself?
A knowledgeable DIYer can begin by visually inspecting the thermistor wiring and connector terminals for obvious damage, pinching, or corrosion. Accurate diagnosis requires a multimeter to measure thermistor resistance at the JP2 connector with the connector removed, then at the thermistor terminals in the compartment. If the thermistor or harness needs replacement, those are parts a capable DIYer could swap out, but if the control board is the source of the fault, professional service is recommended.
Is it safe to keep using my refrigerator when the SH code is showing?
A shorted thermistor input means the control board may not be receiving accurate temperature data, which can lead to improper cooling behavior. Your food could be stored at unsafe temperatures without a visible indication that something is wrong. It is advisable to check actual compartment temperatures with a separate thermometer and address the fault promptly rather than continuing normal use.
How much does it cost to repair an SH error on a Jenn-Air refrigerator?
Repair costs depend on which component is at fault. A replacement thermistor sensor is typically an affordable part, often in the range of $15 to $60 for the component alone. A wire harness repair or replacement may run $30 to $100 or more in parts. A control board replacement is significantly more expensive, often ranging from $150 to $400 or higher for parts, plus labor if a technician performs the work.
Will resetting the refrigerator clear the SH error code?
A power reset may temporarily clear the SH code from the display, but if the underlying fault with the thermistor, wiring, or connector is still present, the code will return when the refrigerator runs its diagnostic routine again. A reset does not repair a shorted thermistor or damaged harness, so proper diagnosis and repair of the root cause are necessary for a lasting fix.

Related Jenn-Air refrigerator codes

All Jenn-Air refrigerator codes
View all 20 Jenn-Air refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass