Kenmore Dryer Moisture Sensor Replacement

A Kenmore dryer with electronic controls dries by conductivity, not by the clock. Two metal bars inside the drum read how wet the tumbling clothes are; damp fabric bridges them, dry fabric does not, and the control ends the cycle when the load stops completing the circuit. When those bars are coated in softener film or the sensor has failed, the dryer loses all sense of when a load is actually done.

Know Your Builder First#

Kenmore is a store brand, so identify the maker from the model number's first three digits:

• A 110-prefix machine is built by Whirlpool. It uses a pair of metal moisture bars mounted inside the drum, wired back to the control.
• A 796-prefix machine is built by LG, using a similar dual-bar design in the drum with its own connector and control logic.

The bars do the same job in both, but the exact sensor part and wiring differ by builder, so match the part to your prefix.

How the Moisture Sensor Works#

As wet clothes tumble across the two bars, they momentarily complete a low-voltage circuit. The control counts how often and how strongly that bridge forms; a wet load bridges constantly, and as it dries the contacts grow intermittent. When the reading crosses the dryness threshold you selected, the cycle ends. Everything about auto-dry accuracy rides on those bars staying clean and their wiring staying intact.

Symptoms of a Failing Sensor#

• Auto-dry cycles shut off after only a few minutes with the load still wet
• The opposite — cycles run far too long and bake the laundry — because the sensor never reads dry
• Timed dry works fine, but every sensor-based cycle is unpredictable
• A fault code appears and the cycle quits early
• Results vary wildly from one load to the next with no consistency

Clean the Bars Before You Replace Anything#

The great majority of Kenmore moisture-sensor complaints are cured with a cleaning, not a part. Liquid fabric softener and dryer sheets leave an invisible waxy film across the bars that insulates them, so the load reads "dry" almost immediately and the cycle ends early. Open the drum, find the two metal strips — usually on the front bulkhead or the lint-screen housing — and scrub them bright with fine sandpaper or an abrasive pad and rubbing alcohol. Run an auto-dry load and check whether accuracy returns before buying anything.

Reading the Fault Codes#

The control often names its own suspect before it quits. Codes in the E1, E2, and E13 group and the F01, F22, F23, F26, and F30 group point at various sensor, thermistor, and control faults across the W10-series electronics — cross-reference the exact code against your tech sheet. Use the code to test the named circuit first, and treat the moisture sensor as the cause only after cleaning the bars and confirming the wiring.

Step-by-Step Replacement#

1. Unplug the dryer, or switch off the breaker on a hardwired unit.
2. Remove the lint screen and any screws in its housing, then open the top or front panel per your model to reach the sensor bars.
3. Trace the two wires from the bars to their connector and photograph it before unplugging.
4. Release the connector and remove the screws holding the sensor strip assembly.
5. Fit the new sensor, reconnect the wiring exactly as photographed, and refit the panel.
6. Restore power and run an auto-dry load to confirm the cycle now ends with dry clothes.

Tools You Will Need#

• A Phillips screwdriver for the lint housing and panel
• Fine sandpaper or an abrasive pad for the cleaning-first step
• A putty knife to release panel clips on some models

Common Mistakes to Avoid#

• Replacing the sensor before cleaning the bars — softener film is the top cause and costs nothing to fix.
• Ordering by model number alone when the builder prefix decides the part.
• Ignoring a fault code that points at a thermistor rather than the moisture sensor.

Repair or Replace the Dryer#

A moisture sensor is a cheap, accessible part, so replacing it is always worthwhile. Reserve replacing the dryer for when the motor, heater, or drum bearings have also failed.

What It Costs#

There is no single price — the Whirlpool-built and LG-built sensors are different parts, and most of any professional charge is the trip and labor. Because cleaning is free and often the real fix, wipe the bars before paying for anything, then match the correct sensor to your model prefix.

How Long It Lasts#

Kept clean, a Kenmore dryer moisture sensor lasts well over a decade. Softener buildup is the main thing that degrades it, so wiping the bars every few months and easing off heavy dryer-sheet use keep auto-dry accurate for years.

Testing the Sensor Bars#

If cleaning does not help, test the bars directly. Unplug the dryer, reach the sensor connector, and set a multimeter to continuity. Dry and untouched, the two bars should read open; bridge them with a damp cloth and the meter should beep, proving the bars and wiring can complete the circuit. No response when bridged means a broken bar or a severed wire, and the sensor should be replaced. Check the wire where it flexes near the drum edge, since tumbling can fatigue the conductor inside intact-looking insulation.

Maintenance to Keep Auto-Dry Accurate#

• Wipe the sensor bars bright every few months, more often if you use liquid softener
• Clean the lint screen before every load so airflow stays consistent for the sensor to read against
• Ease off dryer sheets, which leave the heaviest film on the bars
• Vacuum the sensor area when you deep-clean the lint housing so dust does not bridge the contacts

What Happens If You Delay#

A misreading sensor is more than a nuisance. Cycles that end early leave clothes damp enough to sour in the basket; cycles that never read dry run hot for hours, wasting energy and baking elastic and prints. Chronic over-drying also stresses the heating element and belt, so a dryer left to over-run wears out faster. Cleaning or replacing the sensor early keeps loads consistent and protects the rest of the machine.

• Run a monthly no-load test cycle and confirm auto-dry ends with the drum warm and the load reading dry, so you catch a drifting sensor before laundry day