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Error code reference

Kenmore Dryer Error Code HS

Humidity sensor failure.

Kenmore codesKenmore dryer codes

Humidity sensor failure.

First step from the service manual

Check the humidity sensor.

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 dryer

The HS error code on a Kenmore dryer indicates a humidity sensor failure. The humidity sensor, sometimes called a moisture sensor, is responsible for detecting the moisture level of the air inside the drum during a drying cycle. This sensor communicates with the control board to determine how much moisture remains in the load, allowing the dryer to automatically end the cycle when the clothes reach the target dryness level. When the control board cannot read a valid signal from this sensor, it triggers the HS fault code.

The humidity sensor typically consists of two metal sensing bars or strips mounted inside the drum, usually near the front lint trap area. As wet fabrics contact these bars, a small electrical current passes between them, and the resistance value changes based on moisture content. Higher moisture means lower resistance; drier fabrics result in higher resistance readings. A failure can stem from the sensor bars themselves being coated with dryer sheet residue or lint buildup, which insulates the bars and prevents accurate readings.

Additional causes include damaged or disconnected wiring between the sensor and the control board, corroded sensor contacts, or a fully failed sensor assembly. In some cases, the control board itself may be misinterpreting the sensor signal due to a board fault. Technicians should begin diagnosis by inspecting the sensor bars for buildup, then checking wiring continuity before condemning the sensor or board.

Source: manufacturer service documentation.

Common causes of HS

  1. 01

    Residue or buildup on sensor bars

    Wiring / connection

    Dryer sheet coatings, lint, and fabric softener residue can accumulate on the metal sensor bars inside the drum, insulating them and preventing accurate moisture readings. Cleaning the bars with rubbing alcohol and a clean cloth is the first step to try.

  2. 02

    Faulty or failed humidity sensor

    Part replacement

    The sensor assembly itself can fail over time due to corrosion, wear, or physical damage to the sensing bars. If cleaning does not restore proper function, the sensor will need to be replaced.

  3. 03

    Damaged or disconnected wiring harness

    Wiring / connection

    The wiring connecting the humidity sensor to the control board can become loose, pinched, or broken, preventing any signal from reaching the board. Inspect the connector and wiring for visible damage or a loose plug.

  4. 04

    Corroded sensor contacts or connectors

    Wiring / connection

    Moisture inside the dryer cabinet can cause corrosion at the sensor connector pins or terminals, increasing resistance in the circuit and producing a faulty reading. Corroded connectors may need cleaning or replacement.

  5. 05

    Defective control board

    Part replacement

    If the sensor and wiring both test correctly, the main control board may be failing to process the sensor signal properly. A control board fault is the least common cause and is typically diagnosed after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about HS

What does HS mean on a Kenmore dryer?
The HS code on a Kenmore dryer indicates a humidity sensor failure. The humidity sensor monitors moisture levels inside the drum to control automatic drying cycles. When the control board cannot receive a valid reading from this sensor, it displays the HS fault code and may interrupt normal operation.
Can I fix the HS error on my Kenmore dryer myself?
In many cases, yes. Start by cleaning the moisture sensor bars inside the drum with rubbing alcohol, as residue buildup is the most common cause of this fault. If cleaning does not resolve the error, check the wiring harness connections at the sensor. Replacing a faulty sensor is a moderate DIY repair, but if the control board is involved, professional service is recommended.
Will resetting the dryer clear the HS error code?
A reset may temporarily clear the HS code, but if the underlying issue is not addressed, the error will return. To reset, unplug the dryer for a few minutes and then restore power. The code is likely to reappear during the next cycle if the sensor, wiring, or board problem has not been corrected.
Is it safe to use my Kenmore dryer when the HS code is showing?
The dryer may still run on timed dry cycles even with the HS error present, but auto-sensing cycles will not function reliably. There is no immediate safety hazard from the sensor fault itself, but running a dryer without proper moisture sensing can lead to over-drying clothes or the dryer not stopping at the right time. It is best to address the fault before continued regular use.
How much does it cost to repair a Kenmore dryer showing the HS error?
If only cleaning the sensor bars is needed, the repair costs nothing beyond some rubbing alcohol. Replacing the humidity sensor itself typically costs between $15 and $60 for the part, plus labor if a technician is hired. If the control board is at fault, parts and labor costs can range from $150 to $350 or more depending on the model and service rates in your area.

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