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Error code reference

Kenmore Dryer Error Code F3E5

Inlet and exhaust thermistors are both open; will occur if P4/P14 connector is not plugged into the CCU.

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Inlet and exhaust thermistors are both open; will occur if P4/P14 connector is not plugged into the CCU.

First step from the service manual

Check P4/P14 connector is plugged into the CCU.

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

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What F3E5 means on a Kenmore dryer

The F3E5 error code on a Kenmore dryer indicates that both the inlet thermistor and the exhaust thermistor are reading as open circuits simultaneously. A thermistor is a temperature-sensing resistor that the Central Control Unit (CCU) uses to monitor airflow temperatures at two critical points in the dryer's heating system. When the CCU detects open circuit conditions on both sensors at the same time, it flags F3E5 rather than two separate thermistor fault codes.

The defining characteristic of this particular error is that it almost always points to a wiring or connection issue rather than two failed thermistors. Specifically, the P4/P14 connector that links the thermistor circuit to the CCU is the primary suspect. If this connector is unplugged, loose, or has a broken pin, the CCU loses communication with both sensors simultaneously, which is exactly the condition that triggers F3E5. Two thermistors failing independently at the same moment is statistically unlikely, making the connector the logical first point of inspection.

If the P4/P14 connector is confirmed to be fully seated and in good condition, the next step is to trace the wiring harness from the connector back to both thermistor locations, checking for damaged insulation, pinched wires, or broken conductors. Only after the wiring is ruled out should the thermistors themselves be tested for continuity and proper resistance values. Addressing this code promptly matters because the dryer cannot safely regulate temperature without functional thermistor feedback.

Source: manufacturer service documentation.

Common causes of F3E5

  1. 01

    Disconnected P4/P14 connector at the CCU

    Wiring / connection

    The P4/P14 connector that carries thermistor signals to the Central Control Unit may be unplugged or not fully seated. This is the most common cause and should be checked first by locating the CCU and confirming the connector is firmly locked into its socket.

  2. 02

    Damaged or broken wiring harness

    Wiring / connection

    The wire harness running from the P4/P14 connector to one or both thermistors may have a broken conductor, pinched section, or damaged insulation. Visually inspect the full length of the harness for any signs of wear, burning, or physical damage.

  3. 03

    Corroded or damaged connector pins

    Wiring / connection

    Even if the P4/P14 connector appears plugged in, individual pins inside the connector may be corroded, bent, or pushed back, interrupting the circuit. Inspect the pin terminals closely and check for discoloration or debris.

  4. 04

    Failed inlet thermistor

    Part replacement

    If wiring and connectors check out, the inlet thermistor itself may have failed open. Test the thermistor for continuity and compare its resistance reading to the expected value for the operating temperature.

  5. 05

    Failed exhaust thermistor

    Part replacement

    Similarly, the exhaust thermistor could have failed open. After ruling out connection issues, test this sensor independently for continuity and proper resistance to determine if it needs replacement.

See the test procedure for each cause

Frequently asked questions about F3E5

What does F3E5 mean on a Kenmore dryer?
F3E5 means the dryer's control board has detected that both the inlet thermistor and the exhaust thermistor are showing open circuit readings at the same time. Because both sensors fail simultaneously, this code is almost always caused by a disconnected or faulty P4/P14 connector at the Central Control Unit rather than two independent sensor failures. The thermistors are responsible for monitoring air temperatures inside the dryer, so this fault prevents safe temperature regulation.
How do I fix the F3E5 error on my Kenmore dryer?
Start by locating the Central Control Unit inside the dryer cabinet and checking that the P4/P14 connector is fully plugged in and locked. If the connector is secure, inspect the wiring harness for damage, and check the connector pins for corrosion or bent terminals. If the wiring is intact, use a multimeter to test both thermistors for continuity and proper resistance values to determine if one or both need replacement.
Is it safe to run my Kenmore dryer with an F3E5 error code?
It is not recommended to operate the dryer while F3E5 is active. The thermistors provide temperature feedback that the control board uses to regulate heating safely. Without reliable readings from both sensors, the dryer cannot properly control its heat output, which creates a potential overheating risk. The issue should be diagnosed and corrected before resuming normal use.
Will resetting my Kenmore dryer clear the F3E5 error?
A power reset may temporarily clear the error display, but the code will return as soon as the dryer runs and the control board checks the thermistor circuits again. Because F3E5 indicates an actual open circuit condition, the underlying cause, whether a loose connector, damaged wiring, or a failed thermistor, must be corrected for the error to stay cleared.
How much does it cost to repair an F3E5 error on a Kenmore dryer?
If the fix is simply reseating the P4/P14 connector, there is no parts cost and only a service call fee if a technician is involved, typically in the range of $75 to $150. If a thermistor needs replacement, parts generally cost between $15 and $50 each, with total repair costs including labor ranging from $100 to $250 depending on your location and service provider. Wiring harness repairs fall somewhere in between depending on the extent of the damage.

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