Whirlpool Washer Error Code 20

Error code 20 on a Whirlpool washer means the control has detected a Critical Flood Level condition, calculated when water volume entering the tub exceeds 41 gallons. The machine stops operation automatically to prevent overflow. The most common cause is a pinched pressure tube at the top cover grommet, which disrupts accurate water level sensing.

You should not run the washer while error code 20 is active. This code signals that the machine detected a potential overfill condition, meaning there is a risk of water overflow if the underlying fault is not corrected. Running additional cycles before diagnosing the cause could result in water damage to your home.

Repair costs vary depending on the failed component. A pressure tube correction or reconnection involves little to no parts cost and can often be done without professional help. Replacing a pressure switch or water inlet valve typically runs between $50 and $150 in parts depending on the model. If the control board is at fault, parts and labor together can range from $150 to $400 or more.

Start by inspecting the pressure tube where it passes through the top cover grommet, looking for pinches, kinks, or blockages. If the tube is clear and undamaged, test the pressure switch and water inlet valve for proper operation. If these components check out, the control board may need to be evaluated. Addressing the root cause is necessary before the error will clear reliably.

Resetting the washer may temporarily clear the code, but it will return if the underlying problem is not corrected. The fault that caused the 41-gallon threshold to be reached, whether a pinched pressure tube, a faulty valve, or a defective pressure switch, must be diagnosed and repaired to prevent the error from recurring.