Kenmore Washer F5 Error Code Explained

What the F5 Code Tells You

The F5 code on a Kenmore washer signals a water temperature sensing fault — the main control board lost its ability to read the water temperature inside the wash tub. This breaks the machine's ability to regulate hot and cold water mixing, so the board halts the cycle rather than risk washing clothes at an extreme temperature.

On Whirlpool-manufactured Kenmore washers (model prefix 110.xxxxx — the most common Kenmore washer platform by far), F5 specifically means the thermistor circuit returned a voltage outside the acceptable range. This could be an open circuit (infinite resistance), a dead short (zero resistance), or a reading that the board interprets as a physically impossible temperature (like -40F or 250F).

Your Model Prefix Determines Your Repair Path

Kenmore washers are built by different manufacturers, and the model number prefix tells you which company actually made yours:

• 110.xxxxx — Whirlpool. Uses an NTC thermistor (negative temperature coefficient) that reads approximately 50,000 ohms at room temperature and decreases as water heats up. This is the platform where F5 means temperature sensor fault.
• 796.xxxxx — LG. Error code system is completely different — LG uses "tE" for temperature errors, not F5.
• 417.xxxxx — Frigidaire. Uses "E9" series codes for temperature faults.

If your model starts with anything other than 110, this guide does not apply. The F5 code on non-Whirlpool platforms means something entirely different (on some Frigidaire-built units, F5 relates to the door lock).

What Broke: The NTC Thermistor Circuit

The temperature sensing system on Whirlpool-built Kenmore washers consists of three components wired in series:

1. The NTC thermistor — a ceramic bead encased in a metal probe, mounted in the outer wash tub wall below the water line. As water temperature rises, the ceramic's electrical resistance drops predictably along a known curve.

2. The wiring harness — a two-conductor cable running from the thermistor probe through the rear tub area, along the frame, and up to the main control board connector.

3. The ADC input on the control board — an analog-to-digital converter pin that reads the voltage divider formed by the thermistor and a fixed reference resistor on the board.

The board applies a known voltage through the reference resistor and the thermistor in series. By measuring the voltage at their junction, it calculates the thermistor's resistance, and from that, the water temperature. When the voltage reads at the rail (indicating open circuit / infinite resistance) or at ground (indicating short circuit / zero resistance), the board posts F5.

Step-by-Step Repair

Step 1: Locate the Thermistor

Unplug the washer from the wall outlet. Pull the machine forward to access the rear. On Whirlpool-built Kenmore top-loaders, the thermistor is threaded into the outer tub near the bottom — look for a small cylindrical metal probe with two wires running from it. On front-loaders (Duet/Kenmore HE2/HE3 platform), the thermistor is mounted in the rear tub half, accessible after removing the rear access panel (four to six screws).

Step 2: Test the Thermistor

Disconnect the two-pin wire connector from the thermistor leads. Set your multimeter to the 200K ohm range. Place one probe on each thermistor terminal.

Expected readings at room temperature (70-77F):

• Good thermistor: 48,000-55,000 ohms
• Open (failed): OL / no reading
• Shorted (failed): 0-100 ohms

If the reading is anywhere in the 40K-60K range, the thermistor itself is likely good and the fault lies elsewhere in the circuit.

Step 3: Test the Wiring

With the thermistor still disconnected, go to the main board connector (top of the machine, behind the control panel). Locate the two pins that correspond to the thermistor circuit (consult the wiring diagram on the tech sheet inside the machine's cabinet). Set your multimeter to continuity mode and test from each thermistor wire back to the corresponding board connector pin. Both wires should show near-zero resistance (good continuity). An open reading on either wire means a break somewhere in the harness.

Common break points: where the harness passes over the rear tub brace (vibration wear), where it connects to the tub-mounted sensor (corrosion from splash), and at the board connector itself (heat cycling loosens crimps over years).

Step 4: Check the Board Input

If thermistor and wiring both test good, the fault is in the board's ADC input circuit. This is not field-repairable — the board must be replaced. However, before ordering a $180 board, verify one more thing: reconnect everything and run a diagnostic cycle. If the F5 code is intermittent (appears sometimes but not always), the most likely culprit is a loose connector rather than a failed board. Push all connectors firmly home and secure with tape if they feel loose.

Parts to Order

For Whirlpool-built Kenmore washers (110.xxxxx), order by the Whirlpool OEM part number:

Do not search for "Kenmore thermistor" — you will get incorrect results. Always use the Whirlpool part number for 110-series models.

Sourcing Tips for Kenmore Parts

Because Kenmore parts are actually Whirlpool (or LG, or Frigidaire) parts with a Sears markup, you have options:

1. Best price: Order the OEM part number directly from appliance parts wholesalers. A WPW10467289 thermistor is $12-$15 from parts warehouses vs. $25+ from Sears Parts Direct.

2. Fastest delivery: Amazon often stocks common Whirlpool sensors with next-day delivery.

3. Cross-reference check: Enter your full Kenmore model number on PartSelect or RepairClinic — they will show you the correct Whirlpool part number automatically.

Prevention for the Future

Thermistors have finite lifespans determined by thermal cycling — every wash with hot water stresses the ceramic element. Average lifespan is 8-12 years under normal household use. There is no maintenance that extends this life — it is a wear item like brake pads on a car.

What you can control: avoid power surges that damage the board's ADC circuit. Use a surge protector on the washer's outlet. The $15 investment protects the $180 control board from voltage spikes during storms or power restoration after outages.

Important Note About Kenmore Parts Ordering

Because Kenmore is a multi-manufacturer brand (not a maker itself), parts must be ordered by the actual manufacturer's part number — not by searching "Kenmore washer parts." Your model number prefix identifies the real manufacturer:

For washers: the most common Kenmore washer manufacturer is Whirlpool (prefix 110.xxxxx for washers/dryers, 665.xxxxx for dishwashers, 790.xxxxx for ovens). Parts websites like PartSelect and RepairClinic accept your full Kenmore model number and automatically cross-reference to the correct OEM part number. Always verify the part number matches before ordering — similar-looking parts from different manufacturers are not interchangeable even though both machines say "Kenmore" on the exterior.

The Sears Parts Direct website (now Partstown) also stocks these parts but typically at a higher price point than ordering the OEM part directly from an appliance parts wholesaler. Shopping by the OEM part number rather than the Kenmore part number often saves 20-40% on identical components.

Extending Your Kenmore Washer's Lifespan

Regular maintenance prevents many error codes from developing in the first place. For your Kenmore washer, the most impactful maintenance items are:

Monthly: Run a clean cycle (dedicated Clean Washer cycle or hottest cycle with no clothes and a washer cleaner tablet). This dissolves detergent residue and mineral deposits that accumulate in the wash system, drain path, and sensor areas. Residue buildup causes false sensor readings, slow drainage, and reduced cleaning effectiveness.

Every 3-6 months: Clean the inlet screens where supply hoses connect. Hard water areas should clean every 3 months; soft water areas every 6. Also clean the drain pump filter if your model has an accessible one.

Annually: Inspect supply hoses for bulging, cracking, or discoloration. Rubber hoses should be replaced every 5 years regardless of appearance — internal deterioration is invisible until the hose bursts. Upgrade to stainless steel braided hoses for burst protection.

Always: Use the correct amount of HE detergent (if applicable). Check pockets before every load. Do not overload the drum past 3/4 capacity. Leave the door ajar between loads to prevent mold and mildew in the gasket and tub.

F5 persisting after thermistor replacement? The board's ADC circuit may have secondary damage. Our technicians carry diagnostic equipment that verifies board-level function before ordering expensive replacements. Schedule your diagnostic visit.