F20
Whirlpool Washing Machine
Severity: ModerateWhat Does This Error Mean?
The F20 error means your Whirlpool washer is not getting enough water. The machine started a cycle but couldn't fill the drum in time. This is a water supply or inlet valve problem.
Affected Models
- WFW5620HW
- WFW6620HW
- WFW9620HC
- Most Whirlpool Duet and front-load washers
Common Causes
- Water supply taps turned off or not fully open
- Kinked water inlet hose at the back of the washer
- Clogged mesh filter screens inside the inlet hose connections
- Faulty water inlet valve not opening properly
- Low home water pressure below 20 PSI
How to Fix It
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Check that both water supply taps behind the washer are fully open.
Turn each tap counterclockwise all the way to fully open.
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Inspect both inlet hoses for kinks or sharp bends.
Straighten any hoses that are bent or pinched behind the washer.
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Turn off the taps, disconnect the hoses, and clean the filter screens.
Tiny mesh screens sit inside each inlet port. Rinse them under water if clogged.
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Reconnect the hoses and turn the taps fully back on.
Check for drips at the connection points.
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Restart the cycle and watch for water entering the drum.
If there's still no water flow, the inlet valve needs professional replacement.
When to Call a Professional
If taps, hoses, and filters are all clear and the F20 persists — the water inlet valve has likely failed. Valve replacement costs $100–$220 including labor. Contact Whirlpool support or a certified appliance technician.
Frequently Asked Questions
Is F20 the same as F/20 on a Whirlpool washer?
Yes — they are the same code. Some models display it as F20, others as F/20. Both mean the washer could not fill with enough water.
How long does a Whirlpool washer take to fill with water?
Most cycles begin filling within 1–2 minutes. If the drum hasn't filled enough within about 4 minutes, F20 appears. Slow filling usually points to a clogged filter or low water pressure.
Can I fix the F20 error without calling a technician?
Often yes — if it's a tap, hose, or filter issue. Those fixes take under 15 minutes. If the inlet valve is faulty, that repair needs a technician.