Roper dryer F28: moisture sensor open
F28 (F-28) means the moisture sensor strip circuit reads as open. It appears only in the diagnostic test mode.
What F28 means
- Brand
- Roper
- Appliance
- Gas dryer
- Code
- F28
- Documented meaning
- Moisture sensor open
- Applies to
- 4 Roper models on 1 platform
- Can you keep using it?
- With caution
What the dryer is detecting
Metal strips in the drum let the control sense how wet the clothes are. A circuit that stays open regardless of the load is flagged as a sensor fault.
Causes listed for this condition
In the order the service documentation checks them. Documented causes come from the manufacturer's service documentation for these platforms; possible causes are based on how the system works; unconfirmed marks common assumptions that the documentation does not support.
- Documented An open moisture sensor strip or wiring.
- Possible Residue or a metal object on the strips.
Safe checks you can make
- Wipe the two metal moisture-sensing strips inside the drum (usually near the lint screen opening) with a soft cloth and a little rubbing alcohol to remove fabric-softener film.
- On many models this code is stored only for the service diagnostic menu, so the dryer may still run normally; if you see it, note it for the technician.
Further diagnosis requires opening the appliance. Beyond the owner checks, diagnosis involves removing panels, testing components and checking wiring. We describe what a technician investigates, not how to do it yourself.
What a technician checks
- Runs the moisture sensor test in the diagnostic mode.
- Inspects strip wiring and connections.
Typical repairs and cost
Depending on what diagnosis finds, this code can lead to one of these repairs:
| Repair | Typical range | Labor |
|---|---|---|
| Dryer moisture sensor bar repair | $180–$310 | Light |
Typical total ranges for the Las Vegas area, parts and labor included. The final cost depends on diagnosis, the exact model, parts availability and whether other damage is found.
Can you keep using it?
Use with caution. The dryer usually keeps running; automatic cycles may be inaccurate, so timed dry is a temporary workaround.
Roper models documented with this code
Related problems and codes
Other codes documented on the same Roper platforms:
Repair or replace?
A fault code alone rarely justifies replacing a dryer. Most F28 repairs involve a single component once diagnosed. Replacement becomes worth considering when the unit is near the end of its typical 12–14-year life and the diagnosed repair is a major one. See the repair-or-replace guide.
Need F28 diagnosed in the Las Vegas area?
We repair Whirlpool, Maytag, KitchenAid, JennAir, Amana and other Whirlpool-family appliances in Las Vegas, Henderson, Summerlin and Boulder City. A model number helps but is never required to book.