Whirlpool Washer Error Code F21 (or F02) - Long Drain Error

Low Severity

Drain time exceeds 8 minutes on front-load washers (Duet, Alpha, Maxima), indicating restricted drain flow or malfunctioning pump.

Appliance: Whirlpool Washing Machines

Estimated Time: 20 minutes

Tools Required: Nut driver, towels, bucket

⚠ Common Symptoms & Observations

Washer stops full of water; 'SUD' or 'F21' alternates on display; door stays locked; clothes soaking wet.

🔍 Root Causes for Code F21 / F02

Debris trap filter clogged
kinked drain hose behind unit
standpipe clogged in home plumbing
foreign object jamming drain pump impeller.

🔧 Step-by-Step DIY Troubleshooting & Fix Guide

Unplug washer from power outlet.

On front-load Duet models, remove the bottom lower toe panel (held by 3 Torx or hex screws).

Unscrew the pump filter catch basket slowly with towels ready, and clean out coins, lint, and hair.

Ensure the drain hose is not inserted deeper than 4.5 inches into the drain pipe to prevent back-siphoning.

🔄 Master Reset Procedure for Whirlpool

Press 'Pause/Cancel' twice to cancel the current code, then run a Drain & Spin cycle.

Technician Tip: If the error code reappears immediately after a hard reset, the control board has detected an active electrical open circuit or failed component that requires physical inspection.