E4
Whirlpool Washing Machine
Severity: ModerateWhat Does This Error Mean?
The E4 error on a Whirlpool washer means the machine detected an oversudsing condition — too many soap bubbles. The control detects this through water level sensors that respond to foam as if it were water. When suds get out of control, the washer pauses to let the foam settle before continuing. This protects the pump, drain system, and motor from damage caused by foam.
Affected Models
- Whirlpool Cabrio WTW8500DW
- Whirlpool WTW5000DW
- Whirlpool WTW7300DW
- WTW8900BW
- Most Whirlpool top-load HE washers 2010 and newer
Common Causes
- Using regular detergent in a high-efficiency (HE) washer — regular soap produces far too many suds
- Using too much HE detergent — even HE detergent causes excessive foam if over-measured
- Using fabric softener or cleaning products not designed for HE washers
- Detergent residue buildup in the drum from repeated over-dosing
- Hard water causing some detergents to foam more than expected
How to Fix It
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Do not pause or stop the cycle when E4 appears. The washer will automatically run extra rinse cycles to flush out the excess suds. Let it finish.
The E4 recovery process can add 20 to 30 minutes to the cycle. This is normal. Do not unplug the washer during this process.
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Check the detergent you are using. The bottle must say HE (high-efficiency) on the label. Regular detergent is completely unsuitable for modern Whirlpool HE washers.
HE detergent is formulated to produce very low suds. Regular detergent creates massive amounts of foam in low-water HE machines.
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Measure your detergent carefully. HE detergent requires much less than you think — often just 1 to 2 tablespoons per load. Fill only to the correct line inside the detergent cup, not the top.
Most people use 3 to 10 times more detergent than necessary. Less detergent also means cleaner clothes, since excess soap never rinses out fully.
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Run a Clean Washer cycle with no detergent to flush residual soap from the drum and pump. Use a washer cleaning tablet if available.
Detergent buildup in the drum walls, gasket, and pump creates ongoing foam even when you start using the right amount of detergent.
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If E4 continues after switching to proper HE detergent in correct amounts, clean the pressure switch hose — a small rubber tube that connects the drum to the pressure sensor. Detergent can clog it and cause false oversudsing readings.
The pressure hose is accessible by removing the back panel on most Whirlpool models. Blow through it to check for blockage.
When to Call a Professional
E4 from oversudsing is almost always a user error, not a mechanical fault. If E4 appears even when using the correct amount of HE detergent, the water level sensor may need inspection. A technician can check the pressure switch and hose for $75 to $150.
Frequently Asked Questions
How do I know if my detergent is HE?
Look for the HE symbol on the front or back of the bottle. HE stands for high-efficiency and indicates the detergent is low-sudsing. If your bottle does not have the HE symbol, do not use it in your Whirlpool HE washer. Major brands like Tide, Gain, Persil, and All all make HE formulas.
Can E4 damage my Whirlpool washer?
Not if the washer handles it normally with extra rinse cycles. The risk from E4 is that heavy foam can get sucked into the pump and cause pump strain over time. Repeated E4 errors from chronic oversudsing can shorten pump and seal life. Solving the detergent problem is important for long-term washer health.
Why does my washer show E4 even though I use HE detergent?
The most common reason is still using too much of it. Try cutting your dose in half and see if E4 stops occurring. Also check that no one else in your household is adding extra detergent. If the error occurs regardless of dose, a pressure switch issue may be the cause.