KitchenAid refrigerator F3E8: humidity sensor fault
F3E8 means the control is getting an invalid reading from the relative-humidity (RH) sensor.
What F3E8 means
- Brand
- KitchenAid
- Appliance
- Built-in refrigerator, French-door refrigerator
- Code
- F3E8
- Documented meaning
- Humidity sensor fault
- Applies to
- 29 KitchenAid models on 2 platforms
- Can you keep using it?
- Generally yes
What the refrigerator is detecting
Some refrigerators measure the humidity of the room air with an RH sensor and use it to adjust certain functions. When the sensor reads bad or stops reporting, the control stores F3E8. The code points to a sensing problem, not to a cooling failure.
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 A failed humidity sensor.
- Documented A loose or damaged connection between the sensor and the control board.
Safe checks you can make
- Unplug the refrigerator (or switch off its breaker) for one minute and plug it back in, then see whether the code returns.
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
- Reads the sensor in its service test.
- Checks the wiring and connections back to the control board before replacing the sensor.
Typical repairs and cost
Depending on what diagnosis finds, this code can lead to one of these repairs:
| Repair | Typical range | Labor |
|---|---|---|
| Refrigerator main control board replacement | $300–$750 | Moderate |
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?
Generally safe to keep using. The refrigerator can keep running. If you notice more condensation (sweating) on the cabinet or door edges than usual, mention it to the technician.
KitchenAid models documented with this code
- KBSD702MPS
- KBSD702MSS
- KBSD706MPS
- KBSD708MBS
- KBSD708MPS
- KBSD708MSS
- KBSD736SPS
- KBSD742SPS
- KBSD748SPS
- KBSN702MBS
- KBSN702MPA
- KBSN702MPS
- KBSN708MBS
- KBSN708MPA
- KBSN708MPS
- KBSN742SBE
And 13 more. Use the model lookup to check yours.
Related problems and codes
Other codes documented on the same KitchenAid platforms:
Repair or replace?
A fault code alone rarely justifies replacing a refrigerator. Most F3E8 repairs involve a single component once diagnosed. Replacement becomes worth considering when the unit is near the end of its typical 10–14-year life and the diagnosed repair is a major one. See the repair-or-replace guide.
Need F3E8 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.