Whirlpool Washer Error Code F24 — What It Means & How to Fix It

What 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

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.
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.
Plug the washer back in and run a warm wash cycle.

If the cycle completes without F24, it was a temporary cold water issue.
If the error comes back consistently, the thermistor needs testing.

A technician tests it with a multimeter — a faulty sensor shows incorrect resistance.
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.