Samsung DVE45R6100C/A3 Dryer Moisture Sensor (2-Pack) — Fix Damp Clothes & Short Cycles
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Understanding the Problem
The moisture sensor in Samsung dryers is a pair of metal sensor bars inside the drum that detect humidity and tell the control board when clothes are dry. When the sensor reads moisture correctly the dryer shortens or ends the cycle; if it fails it can cause the dryer to stop too early (leaving clothes damp), run excessively long, or ignore automatic dryness settings. Sensors commonly fail because of lint/residue build-up, oxidation or pitting of the metal bars, physical damage to the sensor or its wiring, or a faulty control board. Many repairs are resolved by cleaning the sensor bars, but if cleaning and basic tests don’t change the behavior you’ll usually need to replace the sensor assembly. Buying the moisture sensor as a 2-pack is common because many kits include both bars or two sensors so you have a matching pair on hand.
Common Symptoms
Dryer ends early with damp clothes, cycles run too long, sensing light stays on or off, inconsistent dryness levels, or the dryer only works on timed cycles.
Common Causes
- Sensor bars contaminated with fabric softener residue, lint, or oxidation preventing a proper humidity reading
- Damaged or corroded sensor bars, broken sensor assembly, or a faulty sensor harness/connector
- Control board or sensor circuit failure that misinterprets or ignores sensor signals
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Helpful Repair Tip
First clean the sensor bars with a soft cloth and rubbing alcohol and run a moist load. If the dryer still behaves incorrectly, use a multimeter to check for a change in resistance when the bars are touched with a damp cloth—no change indicates the sensor is bad and should be replaced.
Frequently Asked Questions
How do I test the dryer moisture sensor?
Unplug the dryer and access the sensor bars (usually inside the drum near the lint trap). Clean the bars first. To test electrically, disconnect the sensor harness and use a multimeter on the ohms setting across the sensor terminals. With the bars dry you should see higher resistance; when you touch them with a damp cloth the resistance should change (usually drop). If there is no change the sensor is faulty. You can also run a manual ‘sensing’ cycle with a wet towel after cleaning—if the dryer still doesn’t sense moisture correctly the sensor likely needs replacement.
Can I replace the moisture sensor myself and how hard is it?
Yes — most moisture sensor replacements are straightforward for a DIYer. Always unplug power first. Remove the dryer top or front panel per your model’s instructions, locate the sensor assembly near the lint trap, disconnect the wiring harness, remove the mounting screws and swap in the new sensor bars (or 2-pack). Reassemble and run a test cycle. Typical time is 30–60 minutes. If you find damaged wiring or the control board still won’t respond after replacing sensors, call a technician.
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