F35
Whirlpool Washing Machine
Severity: CriticalWhat Does This Error Mean?
Whirlpool error F35 means the analog pressure sensor (also called the water level sensor or SUDS sensor) has failed. This sensor monitors water levels and detects excessive suds in the drum. When it stops working, the washer cannot safely manage water levels and halts all operations.
Affected Models
- WFW9620HW
- WFW8620HW
- WFW9400SW
- WFW9500TW
- WFW94HEXW
Common Causes
- The analog pressure sensor itself has failed electronically and needs replacement
- The pressure hose connecting the sensor to the air dome is kinked, cracked, or clogged
- Excessive suds from using the wrong type or too much detergent caused a sensor fault
- A wiring connector to the analog pressure sensor has come loose or corroded
- Moisture or water intrusion has damaged the sensor's internal circuitry
How to Fix It
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Unplug the washer and check whether you recently used a lot of detergent or non-HE detergent.
Too many suds can temporarily trigger F35. If you suspect excess suds, run a Rinse and Spin cycle with no detergent to flush them out.
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Remove the top panel of the washer by unscrewing the two screws at the rear and sliding the panel back and off.
The analog pressure sensor is a small circular component usually located at the back left or back right corner inside the machine.
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Check the thin pressure hose connected to the sensor. Look for kinks, cracks, or a loose connection at either end.
Reattach any loose connections firmly. Straighten any kinks. If the hose has a crack, replace it — replacement hose costs just a few dollars.
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Check the wiring connector on the pressure sensor. Unplug it and plug it back in firmly.
A loose connector is a quick free fix. Corroded pins can sometimes be cleaned with a small amount of electrical contact cleaner.
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If everything looks intact but F35 persists, replace the analog pressure sensor.
Search your model number plus 'analog pressure sensor' to find the correct part. Installation is typically one connector and one hose — a 15-minute job.
When to Call a Professional
The F35 error on Whirlpool front-loaders is well known and the analog pressure sensor is a common replacement part. The sensor typically costs $20 to $50 and is accessible behind the top panel. DIY replacement is achievable for someone comfortable with appliance repairs. Professional replacement runs $100 to $180 including labor.
Frequently Asked Questions
Is F35 a common problem on Whirlpool front-load washers?
Yes — F35 is one of the more frequently reported errors on older Whirlpool front-loaders, particularly models from the mid-2000s to early 2010s. The analog pressure sensor in those models had a known reliability issue. Replacement sensors are widely available and the repair is straightforward.
What kind of detergent should I use to avoid F35?
Always use HE (High Efficiency) detergent in Whirlpool front-load washers. HE detergent is marked with the HE symbol on the container. Regular detergent creates far more suds than HE washers are designed to handle, which can trigger F35 and cause other problems.
Can I test the analog pressure sensor before replacing it?
You can test it with a multimeter by checking resistance across the sensor terminals, but interpreting the results requires knowing the correct resistance values for your specific part. For most homeowners, if the hose and connectors check out fine, replacing the relatively inexpensive sensor is the practical next step.