F24
Whirlpool Washing Machine
Severity: ModerateWhat Does This Error Mean?
The F24 error means your Whirlpool washer has a water temperature sensor (thermistor) fault. The sensor is reading a temperature that is out of the expected range. The machine may stop to prevent overheating or damage.
Affected Models
- WFW5620HW
- WFW6620HW
- WFW9620HC
- Most Whirlpool Duet front-load washers
Common Causes
- Thermistor (NTC sensor) has failed and is reading incorrect temperatures
- Wiring between the thermistor and control board is loose or damaged
- Thermistor submerged in scale or limescale deposits affecting its reading
- Cold incoming water temperature triggering an out-of-range reading
- Main control board fault affecting sensor interpretation
How to Fix It
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Unplug the washer for 60 seconds to reset the control system.
A cold water inlet temperature can sometimes trigger a false F24. Let the water warm slightly.
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Turn on your hot water tap elsewhere in the house for 1 minute.
This clears cold water from the supply line before the washer fills.
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Plug the washer back in and run a warm wash cycle.
If the cycle completes without F24, it was a temporary cold water issue.
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If the error comes back consistently, the thermistor needs testing.
A technician tests it with a multimeter — a faulty sensor shows incorrect resistance.
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Replace the thermistor if confirmed faulty.
It's a small, inexpensive part — usually $15–$40.
When to Call a Professional
Thermistor replacement is one of the simpler appliance repairs. However, accessing the sensor requires some disassembly. Expect repair costs of $80–$200 including parts and labor. Contact Whirlpool support or a certified technician.
Frequently Asked Questions
Is F24 the same as F23 on a Whirlpool washer?
They're related but different. F23 is a heater control error — the heater itself has a fault. F24 is specifically a thermistor (temperature sensor) fault. Both involve the heating system but different components.
Can cold weather cause the F24 error?
Yes. If the washer is in a cold garage or utility room — the water temperature sensor may read out of range. Keeping the room above 50°F (10°C) helps prevent this. A persistent error means the thermistor itself has failed.
How much does a Whirlpool washer thermistor cost?
The thermistor part itself is $15–$40. With professional labor, total repair is $80–$200. It's one of the most affordable washer repairs.