mypros+
Error code reference

Jenn-Air Refrigerator Error Code F3E9

Ambient Temperature Sensor reading is too high or sensor is open/shorted

Jenn-Air codesJenn-Air refrigerator codes

Ambient Temperature Sensor reading is too high or sensor is open/shorted — unit cannot run correctly.

First step from the service manual

Run Test 12; make sure unit is installed correctly and condenser fan is running; check condenser is clean.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for F3E9.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F3E9 means on a Jenn-Air refrigerator

The F3E9 error code on a Jenn-Air refrigerator indicates a fault with the ambient temperature sensor. This sensor monitors the surrounding air temperature near the refrigeration system, providing data the control board uses to regulate compressor and fan operation. When the sensor reading climbs above an acceptable threshold, or when the sensor circuit is detected as open or shorted, the control board triggers this fault and restricts normal operation to prevent system damage.

The most common hardware causes include a failed sensor, damaged wiring in the sensor circuit, or a loose connector at the control board or sensor terminals. However, before replacing any components, installation and environmental conditions must be ruled out. A poorly ventilated installation location can cause genuine ambient temperature spikes that push the sensor reading out of range without any sensor failure. A dirty condenser or a non-functioning condenser fan can produce similar elevated readings by allowing heat to accumulate around the unit.

Diagnostic procedure begins with Test 12, which exercises the sensor circuit and allows technicians to evaluate whether the fault is real or environmentally driven. During this process, confirm the condenser fan is spinning freely and at the correct speed, inspect the condenser coils for lint and dust buildup, and verify the refrigerator has adequate clearance on all sides per installation requirements. If environmental conditions are acceptable and the fault persists, the sensor and its wiring harness should be tested for continuity and correct resistance values before condemning the control board.

Source: manufacturer service documentation.

Common causes of F3E9

  1. 01

    Dirty Condenser Coils

    Wiring / connection

    Accumulated dust and lint on the condenser coils prevent heat from dissipating, causing ambient temperatures near the sensor to rise abnormally. Inspect and clean the condenser coils as a first step before any electrical testing.

  2. 02

    Condenser Fan Not Running

    Part replacement

    A condenser fan that has stopped or is running slowly will allow heat to build up around the refrigeration components, causing the ambient sensor to read an out-of-range high value. Check that the fan blade spins freely and that the motor receives correct voltage.

  3. 03

    Failed Ambient Temperature Sensor

    Part replacement

    The sensor itself can fail internally, producing a reading that is artificially high, zero, or erratic, which the control board interprets as an open or shorted circuit. Testing continuity and resistance at the sensor terminals will confirm or rule out sensor failure.

  4. 04

    Damaged Wiring or Loose Connector

    Wiring / connection

    A broken wire or a disconnected connector in the sensor circuit can cause an open-circuit condition that triggers the F3E9 code even when the sensor is physically intact. Inspect the wiring harness between the sensor and the control board for pinches, burns, or loose pins.

  5. 05

    Poor Installation Ventilation

    Wiring / connection

    If the refrigerator is installed in a confined space without adequate clearance, ambient heat can accumulate to levels that genuinely exceed the sensor's acceptable range. Verify the installation location meets the clearance requirements specified for the unit.

See the test procedure for each cause

Frequently asked questions about F3E9

What does F3E9 mean on a Jenn-Air refrigerator?
F3E9 indicates that the ambient temperature sensor is reporting a value that is too high, or that the sensor circuit is open or shorted. The control board uses this sensor to manage compressor and fan operation, and it will restrict normal function when this fault is detected. The cause can be a failed sensor, wiring issue, dirty condenser, a failed condenser fan, or inadequate ventilation around the unit.
How do I fix the F3E9 error code on my Jenn-Air refrigerator?
Start by running Test 12 to evaluate the sensor circuit, then check that the condenser fan is operating and that the condenser coils are clean and free of debris. Confirm the refrigerator has adequate clearance on all sides for proper airflow. If the environment and airflow are acceptable, test the ambient sensor and its wiring harness for continuity and correct resistance, and replace whichever component is faulty.
Is it safe to keep using my refrigerator when it shows F3E9?
The unit will not run correctly while this fault is active, which means it may not maintain safe food storage temperatures. It is best not to rely on the refrigerator for critical food storage until the fault is resolved. If the code just appeared, check condenser and fan conditions immediately since those are quick fixes that could restore normal operation.
Will resetting the refrigerator clear the F3E9 error code?
A power reset may temporarily clear the code from the display, but F3E9 will return if the underlying cause is not corrected. The control board will re-detect the out-of-range or failed sensor condition as soon as the unit attempts to run normally. Address the root cause first so the fault does not continue to interrupt operation.
How much does it cost to repair a Jenn-Air refrigerator with the F3E9 error code?
Repair costs vary depending on the cause. If the fix is simply cleaning the condenser coils or improving ventilation, costs are minimal. Replacing a condenser fan motor typically runs in the range of $80 to $200 including parts and labor. Replacing the ambient temperature sensor is generally in the $75 to $175 range, while a control board replacement, if needed, can cost $200 to $450 or more depending on the model.

Related Jenn-Air refrigerator codes

All Jenn-Air refrigerator codes
View all 20 Jenn-Air refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass