KitchenAid refrigerator F3E9: ambient temperature sensor
F3E9 means the control has a problem with the room (ambient) temperature reading: either the sensor reads open or shorted, or the room is too hot for the refrigerator to run correctly.
What F3E9 means
- Brand
- KitchenAid
- Appliance
- Built-in refrigerator, French-door refrigerator
- Code
- F3E9
- Documented meaning
- Ambient temperature sensor
- Applies to
- 29 KitchenAid models on 2 platforms
- Can you keep using it?
- With caution
What the refrigerator is detecting
The control measures the temperature around the refrigerator and adjusts its operation to it. On the built-in models the documentation describes this code as the ambient temperature being too high for normal operation, and the service test also flags an open or shorted sensor.
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 The room or alcove around the refrigerator is too hot, for example an un-air-conditioned garage or a space with poor ventilation.
- Documented An installation that does not give the refrigerator the airflow its instructions require.
- Documented A condenser fan that is not running, or a dirty condenser that cannot shed heat.
- Documented A failed ambient sensor or its wiring.
Safe checks you can make
- Check the room temperature. A refrigerator in a hot garage or closed alcove may not be able to run correctly; keep the space within the range the owner's manual gives.
- Make sure the front grille and any ventilation openings are not blocked by rugs, trim, stored items or decorations.
- If your owner's manual describes cleaning the condenser or its grille, do it as described.
- 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 ambient temperature in the service test and checks for an open or shorted sensor.
- Confirms the installation and airflow clearances.
- Runs the condenser fan in service mode and checks that the condenser is clean.
Typical repairs and cost
Depending on what diagnosis finds, this code can lead to one of these repairs:
| Repair | Typical range | Labor |
|---|---|---|
| Refrigerator temperature sensor replacement | $180–$340 | Light |
| Refrigerator condenser fan motor replacement | $190–$400 | Light |
| 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?
Use with caution. Fix any heat or airflow problem around the refrigerator first. Check compartment temperatures; if the fresh-food side rises above 40°F or the freezer no longer keeps food frozen, move perishables to another cold space.
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 F3E9 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 F3E9 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.