f40
Moderate
Whirlpool · Washing Machines
ATC thermistor open or shorted
Quick Answer
Error code F40 on your Whirlpool Washing Machines means: ATC thermistor open or shorted. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Step 1: Unplug the washer.
2
Step 2: Locate the ATC thermistor.
3
Step 3: Test the thermistor with a multimeter for proper resistance.
4
Step 4: Check wiring connections for damage.
5
Step 5: Replace the thermistor if readings are out of range.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
ATC thermistor
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