Whirlpool · Washing Machine

F20

No Water Detected

Severity

High

The error code F20 on your Whirlpool Washing Machine indicates a specific system failure categorized as "No Water Detected". This guide walks you through the most likely causes and the correct repair sequence.

Owner's Summary

The washer started filling but the water sensor never confirmed that water entered the drum. Most of the time the fix is as simple as opening the water tap or cleaning the small filters inside the hose connections.

Symptoms

Whirlpool washer pauses on fill, F20 or FH error flashing

Common Causes

Water supply hoses or valves closed
Inlet valve screens blocked by sediment
Faulty water inlet valve
Pressure switch hose disconnected

How to Fix

1 Turn on water supply valves behind machine
2 Clean inlet valve filter screens
3 Replace water inlet valve
4 Check and reconnect pressure switch hose

Tools You'll Need

Pliers Soft Brush Towels / Bucket

Most of these fixes need only basic hand tools. If your repair requires opening electrical housings or testing live components, a multimeter and basic electrical safety knowledge are essential — when in doubt, call a technician.

Technical Explanation

The CCU monitors the pressure switch state during the fill cycle. If the pressure switch does not transition from the empty state within the fill timeout, or if the switch oscillates unexpectedly, the CCU posts F20 and kills the inlet valve relay.

Is It Safe to Keep Using?

No risk to the appliance. Resolve within a day or two.

Technician's Pro Tip

Always verify household water pressure before replacing the inlet valve — low pressure under 20 PSI can cause F20 without any part failure. A cheap pressure gauge at the utility tap will confirm this.

Related Codes

E2 — Samsung Washing Machine

Water Supply Error

High

4E — Samsung Washing Machine

No Water Supply Detected

High

5E — Samsung Washing Machine

Drain Error — Water Not Draining

High

Frequently Asked Questions

What does error code F20 mean on a Whirlpool Washing Machine?

Code F20 on a Whirlpool Washing Machine indicates "No Water Detected." In practice, the most common trigger is water supply hoses or valves closed. Severity is rated high, and typical repair costs range from $0 to $160.

Can I fix F20 myself, or do I need a technician?

Many cases of F20 can be resolved without a technician. The first step to try: turn on water supply valves behind machine. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my washing machine with code F20 showing?

No risk to the appliance. Resolve within a day or two.

How much does it cost to repair F20 on a Whirlpool Washing Machine?

Repair costs for code F20 typically range from $0 to $160. Valve screen cleaning: $0; Inlet valve: $40–$160. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$0 – $160

Valve screen cleaning: $0; Inlet valve: $40–$160