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Error code reference

Maytag Refrigerator Error Code ES

Shorted thermistor detected by electronic control board.

Maytag codesMaytag refrigerator codes

Shorted thermistor detected by electronic control board.

First step from the service manual

Check thermistor resistance; replace if shorted.

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

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What ES means on a Maytag refrigerator

The ES error code on a Maytag refrigerator indicates that the electronic control board has detected a shorted thermistor somewhere in the refrigerator's temperature sensing circuit. A thermistor is a resistive temperature sensor whose resistance value changes predictably with temperature. When a thermistor shorts internally, its resistance drops to near zero ohms, which causes the control board to receive a signal that falls completely outside the expected range. The board interprets this as a fault condition and displays the ES code to alert the technician or user.

Thermistors are used in multiple locations within a refrigerator, including the fresh food compartment, the freezer compartment, and sometimes the evaporator or defrost circuit. A short can occur due to physical damage to the sensor itself, a wiring harness that has been pinched, worn insulation that has allowed two conductors to contact each other, or moisture intrusion into the connector. Because a shorted thermistor provides no meaningful temperature data, the control board cannot properly regulate cooling cycles, which can result in temperature instability or compressor operation anomalies.

The first diagnostic step is to measure the thermistor's resistance with a multimeter. A properly functioning thermistor will show a resistance value that corresponds to the ambient temperature at the sensor's location. A shorted thermistor will read at or near zero ohms. If the resistance measurement confirms a short, the thermistor should be replaced. The associated wiring harness and connectors should also be inspected for damage, corrosion, or moisture before completing the repair.

Source: manufacturer service documentation.

Common causes of ES

  1. 01

    Failed thermistor with internal short

    Part replacement

    The thermistor itself has failed internally, causing its resistance to drop to near zero ohms. This is confirmed by measuring the sensor directly with a multimeter and finding essentially no resistance.

  2. 02

    Pinched or damaged wiring harness

    Part replacement

    The wiring running from the thermistor to the control board can become pinched by shelving, drawer assemblies, or during servicing, causing the wires to short against each other or against the refrigerator cabinet. Inspect the full length of the harness for visible damage.

  3. 03

    Moisture or corrosion in the connector

    Wiring / connection

    Water or condensation can enter the thermistor connector and create a conductive path between terminals, producing a false short reading. Check the connector for corrosion, discoloration, or visible moisture.

  4. 04

    Worn or compromised wire insulation

    Part replacement

    Over time, wire insulation can crack or wear through, allowing bare conductors to contact each other or the metal cabinet. This is especially common near areas that experience repeated flexing or contact with sharp edges.

  5. 05

    Faulty electronic control board

    Part replacement

    In rare cases, the control board itself may falsely report a shorted thermistor due to a defect in its input circuitry. This should only be considered after the thermistor and wiring have been tested and confirmed good.

See the test procedure for each cause

Frequently asked questions about ES

What does ES mean on a Maytag refrigerator?
The ES error code on a Maytag refrigerator means the electronic control board has detected a shorted thermistor in the temperature sensing circuit. A thermistor is a small sensor that monitors temperature by changing its electrical resistance. When the sensor shorts out, its resistance drops to near zero and the control board can no longer read accurate temperature data, triggering the ES code.
Can I fix the ES error code myself?
A knowledgeable DIYer can diagnose this code by using a multimeter to measure the resistance of the thermistor. If the reading is at or near zero ohms, the thermistor should be replaced. The wiring harness and connectors should also be inspected for pinching, corrosion, or moisture. If you are not comfortable working with electrical components inside a refrigerator, a qualified appliance technician is recommended.
Is it safe to keep using my refrigerator while the ES code is displayed?
With a shorted thermistor, the control board cannot accurately monitor or regulate temperatures inside the refrigerator. This can lead to improper cooling and potential food safety concerns. It is best to address the fault promptly and avoid relying on the unit to maintain safe food storage temperatures until the repair is complete.
How much does it cost to repair the ES error code on a Maytag refrigerator?
If only the thermistor needs replacement, the part itself is generally inexpensive, typically in the range of $15 to $50 depending on the specific sensor. If professional labor is needed, total repair costs including parts and labor can range from $100 to $250. If the wiring harness or control board is involved, costs may be higher.
Will resetting the refrigerator clear the ES error code?
Resetting the refrigerator by unplugging it or cycling power may temporarily clear the ES code from the display, but the code will return if the underlying thermistor fault is still present. A reset does not repair a shorted thermistor or damaged wiring. The root cause must be diagnosed and corrected for the error to be permanently resolved.

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