What the Maytag “SU” Code Means on Your Washer
The Maytag washer error code “SU” typically indicates a suds-related condition — the washer has detected excessive soap suds or an abnormal water level/pressure condition that prevents the machine from completing a normal wash cycle. When the control board senses too many suds (or inconsistent signals from the pressure/level sensor), it will pause or alter the cycle to protect the motor, bearings and plumbing. Users commonly see longer-than-normal cycle times, repeated drain/spin attempts, poor rinsing, clothing that still feels soapy after the cycle, and sometimes water overflow or leaks if the problem is persistent. While usually not immediately dangerous, excessive suds can trap hot water, reduce spin efficiency (leaving clothes wetter), and promote odor or mold growth inside the tub if not corrected.
Common Causes
- Using too much detergent or the wrong type (non-HE detergent in a high-efficiency Maytag washer).
- Detergent buildup inside the dispenser, gasket, tub, or drain system that creates residual suds.
- Clogged or partially blocked drain pump or drain hose preventing efficient water & suds removal.
- Faulty water level/pressure sensor (pressure switch) or a collapsed/blocked pressure hose giving incorrect readings.
- Main control board incorrectly interpreting sensor signals or stuck in a suds/detection loop.
- Overloading the washer — too many clothes can trap detergent and prevent proper rinsing.
- Using fabric softener in excess or incompatible additives that increase suds.
Troubleshooting Steps
- Stop the cycle and remove excess suds: Open the lid or door (when safe) and scoop or wipe out large suds to reduce sud levels. If the machine is locked, unplug it or switch the breaker off first and wait for the door lock to release.
- Run a drain & spin: After removing visible suds, run a “Drain & Spin” or “Spin” cycle to clear water and suds. Repeat if necessary until suds are gone.
- Use correct detergent: Make sure you are using HE detergent for high-efficiency Maytag washers. If non-HE was used, run multiple rinse/drain cycles with no clothes to fully remove residue.
- Use a suds-busting rinse: Add 1/2 cup distilled white vinegar to the wash drum and run a warm rinse cycle to help break down remaining detergent suds and residues.
- Check load size and distribution: Remove some items if overloaded and redistribute the load evenly to improve rinsing and spinning.
- Inspect and clear the drain pump and hose: Disconnect power, then check the drain pump filter (if accessible) and the drain hose for lint, coins or obstructions that could slow drainage and hold suds in the tub.
- Examine the pressure hose and pressure switch: Look for a collapsed, pinched, or ki