mypros+
Error code reference

Kenmore Dryer Error Code F3E7

Moisture sensor strip has shorted; only appears in service diagnostic mode.

Kenmore codesKenmore dryer codes

Moisture sensor strip has shorted; only appears in service diagnostic mode.

First step from the service manual

See TEST #5: Moisture Sensor, page 17.

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 F3E7.

  • 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 F3E7 means on a Kenmore dryer

The F3E7 error code on a Kenmore dryer indicates a shorted moisture sensor strip. The moisture sensor system consists of two metal sensor bars located inside the drum, typically near the lint filter area, that measure the electrical conductivity of clothes as they tumble against the strips. When clothing is wet, the water bridges the two bars and allows a small current to pass between them, signaling the control board that drying is still needed. When the resistance across those strips drops to an abnormal level due to a short, the control board interprets this as a fault condition and stores the F3E7 code.

A short in the moisture sensor circuit can occur at the sensor bars themselves, in the wiring harness that connects the bars to the control board, or at the control board's sensor input circuit. Contamination such as dryer sheet residue or fabric softener buildup on the sensor bars is a frequent contributor, as heavy coating can alter the electrical characteristics of the circuit. Physical damage to the sensor strips or a pinched wire in the harness can also create a direct short to ground or between conductors.

It is important to note that F3E7 only appears during service diagnostic mode and will not display during normal dryer operation. This means the dryer may be completing cycles with inaccurate moisture sensing without triggering a visible error during everyday use. Diagnosis should begin with Test 5 in the service diagnostic procedure, which walks through checking the moisture sensor circuit for proper resistance values and continuity.

Source: manufacturer service documentation.

Common causes of F3E7

  1. 01

    Dryer sheet or fabric softener residue buildup on sensor bars

    Wiring / connection

    A heavy coating of waxy residue from dryer sheets or fabric softener can accumulate on the metal sensor strips and alter their electrical characteristics, effectively creating an abnormal low-resistance condition. Cleaning the bars with rubbing alcohol and a soft cloth is the first step to rule this out.

  2. 02

    Shorted or damaged moisture sensor strips

    Part replacement

    The sensor bars themselves can crack, corrode, or short internally if they have been exposed to physical damage or prolonged moisture exposure. Inspecting the strips for visible damage and measuring resistance across them as outlined in Test 5 will confirm whether replacement is needed.

  3. 03

    Pinched or damaged wiring harness

    Part replacement

    The wiring between the moisture sensor bars and the control board can become pinched, frayed, or shorted against the dryer cabinet during a repair or over time from vibration. A visual inspection of the harness and a continuity check of each conductor will identify this issue.

  4. 04

    Moisture or water intrusion into the sensor circuit

    Wiring / connection

    Water entry into the dryer cabinet, whether from an overloaded drum or an external source, can create a temporary short across the sensor circuit. If the fault clears after the interior fully dries, water intrusion rather than component failure is the likely cause.

  5. 05

    Faulty main control board

    Part replacement

    If the sensor bars and wiring harness both test within normal parameters, the fault may reside in the sensor input circuit on the main control board itself. Control board replacement is considered only after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about F3E7

What does F3E7 mean on a Kenmore dryer?
F3E7 indicates that the moisture sensor strip circuit has shorted. The moisture sensor bars inside the drum are responsible for detecting how wet the laundry is so the dryer can adjust cycle timing accordingly. This code only appears during service diagnostic mode, not during a standard drying cycle. Diagnosis should start with Test 5 of the service diagnostic procedure to evaluate the sensor circuit.
Can I fix the F3E7 error code myself?
Some causes of F3E7 are DIY-friendly, particularly cleaning residue buildup off the sensor bars using rubbing alcohol. However, if the fault is in the wiring harness, the sensor strips, or the control board, repairs involve accessing internal components and working near electrical connections, which requires comfort with appliance disassembly. Following Test 5 in the diagnostic procedure will help you narrow down the cause before purchasing parts.
Is it safe to keep using my Kenmore dryer when F3E7 appears?
Because F3E7 only appears in service diagnostic mode and not during normal operation, the dryer will generally continue to run. However, a faulty moisture sensor means the dryer may not accurately detect when clothes are dry, which can lead to overdrying, increased energy use, and unnecessary wear on fabrics. It is advisable to diagnose and correct the fault rather than continuing to rely on the dryer for accurate moisture sensing.
Will resetting the dryer clear the F3E7 code?
A power reset may temporarily clear the stored code, but if the underlying short in the moisture sensor circuit has not been resolved, the fault will return the next time a service diagnostic test is run. Clearing the code without addressing the root cause does not repair the sensor circuit and the dryer will continue to operate with inaccurate moisture detection.
How much does it cost to repair the F3E7 error on a Kenmore dryer?
Repair costs depend on the cause. Cleaning the sensor bars costs nothing beyond a small amount of rubbing alcohol. Replacement moisture sensor strips typically range from $15 to $45 for parts, while a new main control board can range from $80 to $200 or more depending on the model. If you hire a technician, expect to add labor costs of $75 to $150 on top of any parts.

Related Kenmore dryer codes

All Kenmore dryer codes
View all 105 Kenmore dryer codes

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

Get Started

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