Moisture sensor failure

Locate the two metal sensor bars inside the drum near the lint screen
Clean with fine sandpaper or rubbing alcohol to remove fabric softener residue
Test continuity from sensor bars to control board connector
If bars are corroded through, replace the sensor assembly
Pro Diagnostic Tip
The Whirlpool-built 110-series Kenmore senses dryness through two metal bars just inside the drum near the lint screen. Dryer-sheet wax builds an insulating film across those bars that fools the auto-dry logic, so wipe them down monthly with rubbing alcohol if you use sheets before assuming the sensor has failed.
Repair Difficulty
Easy — DIY FriendlyEstimated Repair Cost
$50–$175
Parts + labor. Free diagnosis with repair.
Parts That May Need Replacement
Gas leak detector ($130), thermal fuse tester ($95), belt tension gauge, and vent inspection camera ($180). Our technician arrives with $3,000+ in professional tools — your diagnostic is free.
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Here's what a professional technician does to resolve this issue:
Clean moisture sensor bars with fine sandpaper
This repair requires gas leak detectors, thermal fuse testers, and high-voltage multimeters. Most homeowners find it safer and more cost-effective to have a licensed technician handle it.
Gas dryers carry carbon monoxide and explosion risk. Even electric dryers involve 240V circuits that can deliver a fatal shock. Our techs are licensed and insured — let them handle the risk.
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Don't let error code F28 disrupt your day. A professional diagnosis takes about 30 minutes — and it's free when you proceed with the repair.
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Kenmore error code F28 indicates: Moisture sensor failure. This is a medium-severity issue affecting your dryer.
Locate the two metal sensor bars inside the drum near the lint screen Then, Clean with fine sandpaper or rubbing alcohol to remove fabric softener residue Then, Test continuity from sensor bars to control board connector There are 1 more steps — see the full troubleshooting guide above. If these steps don't resolve the error, contact a professional.
Besides the error code on the display, common signs include: Auto-dry quits early and leaves the load damp; Timed dry works fine but auto-dry will not; Some loads come out badly overdried. If you notice any of these symptoms, check your dryer's display panel for error code F28.
Repair costs for Kenmore F28 typically range from $50 to $175 depending on the specific cause and parts needed. EasyBear offers free diagnosis when you proceed with the repair. Call (415) 795-7300 for a same-day appointment.