Jenn-Air Refrigerator Error Code F3E8

F3E8 means the relative humidity sensor is not working or is sending an invalid signal to the High Voltage Board. The refrigerator uses this sensor to monitor moisture levels inside the cabinet. The fault triggers when the HV Board cannot receive a usable reading from the sensor. Diagnosis starts with running Test 104 to evaluate the sensor, followed by checking the wiring connections if the sensor reads bad.

The F3E8 fault is not a direct safety hazard in the way that a gas leak or electrical short would be. However, a non-functioning humidity sensor means the refrigerator cannot properly regulate moisture levels, which could affect food preservation over time. The refrigerator will typically continue running, but internal conditions may not be optimal until the fault is resolved.

A power reset may temporarily clear the F3E8 code, but it will return if the underlying cause is not repaired. Because the fault is tied to an active sensor failure or wiring issue, the HV Board will detect the problem again once the refrigerator resumes normal operation. A proper repair, confirmed through Test 104, is required to permanently resolve the error.

A knowledgeable DIYer can inspect the wiring connector between the RH sensor and the HV Board for loose or corroded connections, which is the first recommended step after a failed Test 104. However, running Test 104 itself typically requires access to the service diagnostic mode, and replacing the HV Board involves working near high-voltage components. If you are not comfortable with appliance electronics, having a qualified technician handle the repair is advisable.

Repair costs depend on what component has failed. If only a wiring connector needs reseating or cleaning, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing the RH sensor itself is generally a lower-cost part repair, while replacing the HV Board is more expensive, with parts and labor combined potentially ranging from $200 to $500 or more depending on your location and the specific model.