A drain pump failure is one of the most common and costly dishwasher problems, but regular maintenance can prevent 80% of draining issues caused by clogged filters and debris buildup. By following these proven maintenance practices, you can extend your drain pump’s lifespan and avoid expensive repairs or replacement.
Why Drain Pumps Fail
Drain pumps fail primarily due to:
Daily Maintenance Habits
1. Scrape Dishes Before Loading
Remove large food particles – Scrape plates, bowls, and utensils into the trash
Don’t rinse completely – Modern dishwashers need some food residue for sensors to work properly
Check for bone fragments, pits, and seeds – These won’t break down and can jam the pump
2. Use the Machine Regularly
Run at least 2–3 cycles per week – Prevents seals from drying out
Avoid letting water sit – Standing water promotes debris settling and bacterial growth
Weekly Maintenance Tasks
3. Clean the Filter (Every 2–3 Weeks)
The filter is the most critical component for preventing drain pump failure. A clogged filter causes about 80% of dishwasher draining problems.
How to clean the filter:
Remove the bottom basket – Take out the lower rack to access the filter
Move the spray arm – Rotate or remove the spray arm if it blocks filter access
Twist and lift the filter – Carefully twist the cylindrical top counterclockwise and lift the filter unit away
Rinse under hot water – Use a soft brush to remove grease and food particles
Check for debris – Inspect for small objects, glass shards, or buildup
Replace securely – Place filter back, ensuring arrows line up to lock it in position
4. Check the Pump Area Weekly
Regularly checking your dishwasher’s filter and pump area is the best way to prevent draining issues and unpleasant odours.
Pump inspection steps:
Remove residual water – Use a sponge to soak up standing water from the pump area
Wear protective gloves – Essential for protection against broken glass fragments
Access the pump – Use a spoon to prise off the pump cover, then grip the lug and pull upwards
Remove foreign objects – Check for glass, utensils, or debris blocking the impeller
Verify impeller movement – Ensure the pump impeller can move freely without obstruction
Replace cover securely – Click the pump cover back into position until it engages correctly
Monthly Maintenance Tasks
5. Clean Spray Arms
Remove spray arms – Twist or unclip from their mounting
Check for clogs – Inspect spray holes for debris blockage
Clear holes with a toothpick – Remove hardened food or mineral buildup
Rinse thoroughly – Run water through spray arms to flush debris
6. Run a Hot Water Cleaning Cycle
Run hot water at the sink first – Ensures hot water enters the dishwasher immediately
Use dishwasher cleaner – Add Affresh Dishwasher Cleaner or similar product
Alternative: Use vinegar – Place a cup of white vinegar on the top rack and run a hot cycle
This breaks down residue – Prevents buildup before it becomes a blockage
7. Check the Drain Hose
Inspect for kinks – Ensure the hose isn’t bent or compressed
Check for clogs – Disconnect and flush with hot water if accessible
Verify proper connection – Ensure hose is securely attached to drain and garbage disposal
Quarterly Maintenance Tasks
8. Deep Clean the Interior
Use baking soda and vinegar – Sprinkle baking soda on the bottom, then run a hot cycle with vinegar
Wipe door seals – Clean rubber gaskets with mild soap and water
Check door alignment – Ensure the door closes tightly and seals properly
9. Inspect the Garbage Disposal
If your dishwasher connects to a garbage disposal:
Run the disposal – Clear any backups before running the dishwasher
Remove the knockout plug – New installations require this to be removed for proper drainage
Annual Maintenance Tasks
10. Professional Inspection
Schedule annual service – Have a technician inspect the pump and electrical components
Test pump continuity – Use a multimeter to check for pump failure signs
Replace worn parts – Proactively replace seals, hoses, or components showing wear
Signs Your Drain Pump May Be Failing
Watch for these warning signs that indicate pump problems:
What NOT to Do
Never use an electric screwdriver on pump covers – Use only manual tools to avoid damage
Don’t ignore standing water – Even small amounts indicate developing problems
Avoid harsh chemicals – Use manufacturer-approved cleaners only
Don’t overload the dishwasher – This creates excessive debris and strains the pump
Maintenance Schedule Summary
When to Call a Professional
If maintenance doesn’t resolve drainage issues, contact Refitec.co.ke at 0704843613 for professional drain pump diagnosis and replacement in Kileleshwa and Nairobi. Their certified technicians provide same-day service with a 1-year warranty on all parts and labor.
By following this maintenance routine, you can prevent most drain pump failures and extend your dishwasher’s lifespan by years, saving hundreds of shillings in repair costs.