🍽️ Dishwasher not draining

⚠️ Common Causes

Drain pump blocked or failed, drain hose kinked or clogged, air gap clogged, garbage disposal knockout plug not removed

🔧 Parts to Check

• Drain pump
• Drain hose
• Filter
• Air gap

🔧 Troubleshooting Steps

1. Check error code — common: 'E23/E25' (Bosch), 'i20' (Frigidaire), 'F21' (Whirlpool)
   ✓ Expected: Note code displayed
2. Remove and clean filter — food debris at bottom of dishwasher blocks drainage
   ✓ Expected: Filter clean
3. Check drain pump — listen for pump running during drain cycle. If silent, pump may be failed
   ✓ Expected: Pump humming
4. Test drain pump with multimeter — should read 15-40Ω
   ✓ Expected: 15-40Ω
5. Check drain hose for kinks or clogs — disconnect from disposal/wall drain, blow through
   ✓ Expected: Hose clear
6. Check air gap (if installed) — remove cap, clear debris from the air gap chamber
   ✓ Expected: Air gap clear
7. Verify garbage disposal knockout plug was removed — some installers forget this
   ✓ Expected: Plug removed from disposal inlet

💡 Related Resources

• Look up error codes for your appliance
• Component failure reference — ohm ranges and test procedures
• All troubleshooting guides — browse by appliance type
• Find service manuals for your specific model