Maytag Washer Error Code SU

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

1. 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.
2. 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.
3. 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.
4. 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.
5. Check load size and distribution: Remove some items if overloaded and redistribute the load evenly to improve rinsing and spinning.
6. 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.
7. Examine the pressure hose and pressure switch: Look for a collapsed, pinched, or kinked pressure hose (small clear tube between tub and pressure switch). Replace if brittle, clogged or leaking. Test the pressure switch for continuity if you have a multimeter.
8. Clean the dispenser and tub: Remove and thoroughly clean the detergent dispenser, dispenser drawer area, and gasket/tub surfaces where detergent can collect and create suds during later cycles.
9. Reset the washer: Unplug the washer for 1–5 minutes or flip the breaker to reset the main control board and clear codes. Run an empty rinse cycle to verify the code does not return.
10. Check for error code recurrence: If “SU” returns after proper detergent use and clearing obstructions, suspect a failing pressure switch, pressure hose, or a control board issue and consider professional diagnostic service.

Maintenance / Prevention Tips

• Always use the correct amount of HE detergent — follow detergent manufacturer guidelines and your washer’s load size recommendations.
• Use only high-efficiency (HE) detergent with HE/modern Maytag washers to minimize suds.
• Measure liquid or powder detergent with the provided cap or scoop; avoid guessing or overfilling.
• Avoid using too much fabric softener or incompatible laundry additives that increase suds.
• Run a monthly washer-clean cycle with a tub-cleaner or 2 cups of white vinegar to remove residue and build-up.
• Leave the door or lid open between loads to dry the tub and reduce mold and detergent residue.
• Clean the detergent dispenser drawer and housing regularly to prevent buildup that causes suds.
• Inspect and clean the drain pump filter and drain hose every 6–12 months to prevent clogs.
• Do not overload the washer — follow load-size guidance to ensure proper agitation and rinsing.
• Check and replace the pressure hose if it becomes stiff, cracked, or shows signs of blockage.
• If you use powdered detergent, dissolve it in water before adding for cold-water washes to reduce residue.
• Consider using a detergent designed to reduce suds in soft water areas.
• Perform a visual inspection of the tub opening and bellows for trapped detergent residue and clean as needed.
• Schedule periodic professional service if your washer performs heavy loads frequently (e.g., large families or commercial-like usage).

Frequently Asked Questions (FAQs)

Q: Is the SU code dangerous?

A: Not usually dangerous, but it prevents the washer from operating normally and can cause poor rinse performance, longer cycles, odors, and potential overflow if ignored. Always power off the washer before inspecting internal components.

Q: Can I clear the SU code by resetting the washer?

A: A reset can clear the code temporarily, but if the root cause (excess detergent, clogged drain, faulty pressure switch) remains, the code will likely return. Use reset as a first step after removing suds and checking for obvious issues.

Q: How much detergent should I use?

A: Follow the detergent manufacturer’s directions for HE washers and account for load size and soil level. Typically far less is needed in HE machines than in older washers.

Q: When should I call a technician?

A: Call a professional if you’ve cleared suds, used proper detergent, inspected hoses and pump, and the SU code keeps returning — especially if you suspect a failed pressure switch or control board.

Conclusion / Safety Notice

Excess suds and the Maytag “SU” code are often resolved through careful detergent use, cleaning, and simple checks of the drain and pressure components. However, working inside a washer involves electrical and mechanical hazards. Always disconnect power before inspecting internal parts. If you are uncomfortable performing checks or if the code persists after basic troubleshooting, contact a certified appliance technician to diagnose and repair potential pressure switches, drain pumps or control board issues safely.

For persistent or complex issues, call an authorized Maytag service provider — professional diagnostics will protect your washer and ensure a safe, lasting repair.