What this error means
The F13 error code on your Whirlpool washing machine means the NTC thermistor (temperature sensor) has developed a fault — the machine cannot accurately read the water temperature and has stopped as a safety precaution.
The F13 error specifically points to a fault with the NTC (Negative Temperature Coefficient) thermistor — the small sensor that monitors water temperature throughout the wash cycle. As water temperature rises, the resistance of the NTC thermistor drops in a predictable, measurable way. The main control board uses this resistance reading to determine the current water temperature and adjust the heating element accordingly. If the sensor reads an impossible temperature (such as -40°C or above 120°C), shows no reading at all, or produces an erratic signal, the board logs F13 and stops the cycle. This is a safety feature — running a cycle with an unknown water temperature risks either scalding the laundry at excessive temperatures or failing to clean at the set temperature. The NTC thermistor is typically mounted directly on the heating element assembly or on the sump hose. It is a relatively inexpensive and accessible component to replace.
Step-by-step
Symptoms to look for
- F13 displayed on the control panel
- Machine stops part-way through a heated wash cycle
- Laundry coming out at the wrong temperature (too cold or scalding hot)
- Machine completes fill and starts tumbling but stops before heating
- F13 appearing consistently on every heated programme
Diagnostic steps
Unplug the machine for 2 minutes, then restart and run a full heated wash cycle. If F13 does not appear, the fault was a temporary sensor misread. If F13 returns — either immediately or part-way through the cycle — the thermistor needs testing.
On most Whirlpool front-load washing machines, the NTC thermistor is clipped directly onto the heating element at the base of the drum, accessible after removing the rear panel of the machine. Some models have the thermistor mounted on the sump hose (the large rubber hose at the bottom of the machine). It typically looks like a small cylindrical or oval plastic component with two wires.
A qualified engineer will disconnect the thermistor and measure its resistance with a multimeter at room temperature. A healthy NTC thermistor should read approximately 5,000–20,000 ohms at room temperature depending on the model (check the service manual for the exact specification). An open circuit (infinite resistance) or short circuit (zero ohms) reading confirms a failed sensor.
If the thermistor is confirmed faulty, the replacement process involves removing the rear panel (usually 6–8 screws around the perimeter), locating the element/thermistor assembly, disconnecting the wiring connectors, unclipping the thermistor, and fitting the new component in reverse order. Some models require partially draining the drum via the pump filter before the element assembly can be safely removed.
Refit the rear panel, plug the machine back in, and run a full heated cycle at 60°C. Monitor the cycle from start to finish to confirm F13 does not return and that the water is reaching temperature.
When to call an engineer
- F13 returns consistently after power reset
- Thermistor shows open circuit or short circuit on multimeter test
- F13 appears part-way through every heated cycle
- Thermistor or element assembly is confirmed as the correct part for the model but fault persists after replacement
- Any burning smell or scorch marks near the element assembly
Frequently asked questions
What does F13 mean on a Whirlpool washing machine?
Is the NTC thermistor the same as the heating element?
Can I fix F13 myself on a Whirlpool washing machine?
How much does it cost to replace the thermistor on a Whirlpool washing machine?
Why does F13 only appear part-way through a heated cycle?
🎯 What is most likely causing your Whirlpool F13 error?
⚠️ Estimates based on common faults — not a guaranteed diagnosis. Always verify before ordering parts.
Parts you may need
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Usually found on a label inside the door frame or on the back panel of the machine.
| Part | Approx. UK Cost | Find it |
|---|---|---|
| NTC Sensor | £15 - £20 | 🛒 Amazon UK → |
| NTC Sensor | £15 - £20 | 🏷️ eBay UK → |
ℹ️ Prices are approximate. Always check the part number matches your model before ordering. Not sure of your model number? Find out how to locate it here.