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Error code reference

Kenmore Air Conditioner Error Code HS

Heat sensor has failed.

Kenmore codesKenmore air conditioner codes

Heat sensor has failed.

First step from the service manual

Contact 1-800-4-MY-HOME® for repair.

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

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What HS means on a Kenmore air conditioner

The HS error code on a Kenmore air conditioner indicates that the heat sensor has failed. The heat sensor is a thermistor-based component responsible for monitoring temperature at a critical point in the refrigeration or airflow circuit. When the control board receives a signal from this sensor that falls outside an expected resistance or voltage range, it interprets this as a sensor failure and displays the HS code to alert the user.

Heat sensor failures can occur due to a few distinct causes. The thermistor element itself can degrade over time, producing readings that no longer correspond to actual temperatures. Wiring harnesses connecting the sensor to the control board can develop breaks, corrosion, or loose terminal connections, which interrupt the signal. In some cases, the control board's input circuit for the sensor may be at fault rather than the sensor component itself.

Because this error directly involves a temperature-monitoring safety circuit, the unit may restrict operation to prevent unsafe conditions. Diagnosing this fault properly requires measuring thermistor resistance at various temperatures and checking continuity through the associated wiring. Given the diagnostic complexity and the need for accurate component identification, Kenmore directs users to contact 1-800-4-MY-HOME for professional repair service rather than attempting self-repair.

Source: manufacturer service documentation.

Common causes of HS

  1. 01

    Failed heat sensor thermistor

    Part replacement

    The thermistor element inside the heat sensor degrades over time and begins producing out-of-range resistance readings. This is the most direct cause of the HS code and typically requires sensor replacement.

  2. 02

    Damaged or corroded sensor wiring

    Wiring / connection

    The wiring harness connecting the heat sensor to the control board can develop breaks, loose terminals, or corrosion, interrupting the signal. Inspecting connectors for oxidation or physical damage can help identify this issue.

  3. 03

    Loose or disconnected sensor connector

    Wiring / connection

    Vibration during normal operation can cause the sensor connector to work loose from the control board or sensor housing. Reseating the connector may resolve the fault if no other damage is present.

  4. 04

    Control board input circuit fault

    Part replacement

    If the sensor and wiring test correctly, the control board's sensor input circuit may have failed, causing it to misread or reject the sensor signal entirely. This requires board-level diagnosis or replacement.

See the test procedure for each cause

Frequently asked questions about HS

What does HS mean on a Kenmore air conditioner?
The HS code on a Kenmore air conditioner means the heat sensor has failed. The heat sensor monitors temperature within the unit, and when the control board detects a signal that falls outside the expected range, it triggers this error. The unit may limit or stop operation until the issue is resolved. Kenmore recommends calling 1-800-4-MY-HOME for professional repair.
Can I reset my Kenmore air conditioner to clear the HS error code?
A power reset may temporarily clear the HS code, but if the heat sensor or its wiring has actually failed, the error will return once the unit restarts and polls the sensor again. Resetting does not repair the underlying hardware fault. A proper repair requires diagnosing and replacing the faulty component.
Is it safe to keep running my Kenmore air conditioner when the HS code is displayed?
Continuing to operate the unit with an active HS code is not recommended. The heat sensor is part of the temperature monitoring system, and running the unit without a functioning sensor means it cannot properly detect unsafe heat conditions. This could potentially lead to overheating or component damage over time.
How much does it cost to fix the HS error code on a Kenmore air conditioner?
Repair costs vary depending on the root cause. If only a wiring connection needs to be reseated, the cost may be limited to a service call fee, typically in the range of $75 to $150. If the heat sensor thermistor needs replacement, parts and labor combined often fall between $100 and $250. A control board replacement would be at the higher end of the cost range.
Who should repair the HS error code on a Kenmore air conditioner?
Kenmore specifically directs users to contact 1-800-4-MY-HOME for this error, indicating that a qualified service technician should handle the diagnosis and repair. The repair involves working with sensor wiring and potentially the control board, which requires proper tools and technical knowledge. Attempting self-repair without the appropriate background risks further damage to the unit.

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