Common Dishwasher Faults and Repair Solutions

Your dishwasher is one of the most convenience-boosting appliances in your home, but when it starts malfunctioning, it can quickly become a source of frustration. From water not draining to dishes coming out dirty, understanding common dishwasher faults and their repair solutions can save you time, money, and the hassle of calling a technician for minor issues. This guide covers the 7 most common dishwasher problems and how to fix them, whether through DIY troubleshooting or professional repair.

1. Dishwasher Not Draining

Signs of the Problem

• Water remains at the bottom of the dishwasher after the cycle ends

• The dishwasher won’t start a new cycle because it detects standing water

• Gurgling or slow drainage sounds

Likely Causes

DIY Fix Steps

1. Power off the dishwasher and unplug it or turn off the circuit breaker

2. Remove the lower rack and locate the filter at the bottom

3. Lift out the filter and rinse it under warm water; scrub gently with a soft brush

4. Inspect the sump area for seeds, glass fragments, or food labels

5. Check the drain hose behind or under the unit for kinks; straighten if bent

6. Flush the drain hose with warm water to clear blockages

7. Run a hot cycle with a cup of white vinegar to clear light buildup

If the problem persists after cleaning, the drain pump may need replacement—this requires a professional technician.

2. Dishwasher Not Cleaning Dishes Properly

Signs of the Problem

• Dishes come out with food residue or grease

• Glasses appear cloudy or spotted

• Lower rack items are dirtier than upper rack items

Likely Causes

DIY Fix Steps

1. Remove spray arms by popping them off their mounts

2. Clear each nozzle with a wooden toothpick or small wire to remove debris

3. Rinse spray arms under running water to flush out particles

4. Reattach spray arms and ensure they spin freely

5. Reload dishes properly: face dirty surfaces toward spray arms, separate nested bowls, avoid crowding

6. Use manufacturer-recommended detergent and keep rinse aid topped up

7. Check water temperature by running the hot water at the sink before starting the dishwasher

3. Dishwasher Leaking Water

Signs of the Problem

• Water pools on the floor around the dishwasher

• Water leaks from the door during the cycle

• Dampness under the kitchen sink

Likely Causes

DIY Fix Steps

1. Wipe and inspect the door gasket around the entire perimeter; replace if torn or flattened

2. Tighten hose clamps at the inlet and drain connection points

3. Check the float switch at the bottom of the tub; ensure it moves freely and isn’t stuck

4. Verify the door closes fully and latches securely; adjust the latch if necessary

5. Inspect the inlet valve for drips; if it leaks when the dishwasher is off, replace the valve

If leaks continue after these steps, the door latch mechanism or inlet valve may need professional replacement.

4. Dishwasher Making Strange Noises

Signs of the Problem

• Grinding, buzzing, or rattling sounds during operation

• Squealing or screeching noises

• Loud humming at the start of the cycle

Likely Causes

DIY Fix Steps

1. Stop the cycle immediately if the noise is severe

2. Re-seat rattling utensils and ensure no items are touching the spray arms

3. Check the filter and sump for debris; clean as described in Problem #1

4. Secure loose spray arms by tightening the mounting nut

5. Verify you’re using the correct amount of dishwasher detergent (not regular dish soap)

6. Listen for the noise type: buzzing at start often means water supply is off; grinding that returns after cleaning points to motor/pump issues

Grinding or squealing that persists after cleaning usually indicates a motor or pump failure—schedule professional service.

5. Dishwasher Not Drying Dishes

Signs of the Problem

• Dishes are wet after the cycle completes

• Water droplets remain on glasses and plastic items

• Towel-drying is still necessary

Likely Causes

DIY Fix Steps

1. Inspect the heating element at the bottom of the tub for visible breaks or burn marks; replace if faulty

2. Fill the rinse-aid dispenser and adjust the setting to a higher level

3. Select a drying-boost option if your dishwasher has one (e.g., “Extra Dry” or “Heated Dry”)

4. Avoid using eco mode when you need dishes fully dry

5. Open the door slightly after the cycle ends to let steam escape (if your model allows)

6. Dishwasher Smells Bad

Signs of the Problem

• Foul odor when opening the dishwasher

• Musty smell on clean dishes

• Persistent bad smell even after washing

Likely Causes

DIY Fix Steps

1. Clean the filter thoroughly as described in Problem #1

2. Wipe the door gasket with a damp cloth and mild detergent

3. Run a monthly cleaner cycle with a dishwasher cleaner or a cup of white vinegar placed on the top rack

4. Scrape excess food from dishes before loading to prevent buildup

5. Leave the door slightly ajar between cycles to allow air circulation and prevent mold

7. Dishwasher Buttons/Controls Not Working

Signs of the Problem

• Control panel is unresponsive

• Buttons don’t light up or register presses

• Cycle won’t start or stops mid-cycle

Likely Causes

DIY Fix Steps

1. Check if “Child Lock” or “Control Lock” is enabled; disable it according to your manual

2. Power-cycle the unit by turning it off, waiting 5 minutes, then turning it back on

3. Check the power supply: ensure the plug is connected, the circuit breaker hasn’t tripped, and the outlet works

4. Verify the door is fully closed and the latch clicks securely

5. Press the reset function (if your model has one) by turning off, waiting one minute, and restarting

If the panel remains unresponsive or flickers, the control board may need professional diagnosis and replacement.

When to Call a Professional Technician

While many dishwasher issues can be fixed with DIY troubleshooting, some problems require a certified technician:

For professional dishwasher repairs in Nairobi covering all brands (Bosch, Samsung, LG, Whirlpool, Miele, and more), contact Refitec.co.ke at +254 704 843 613 for same-day service with genuine parts and a 90-day warranty.

Prevention Tips to Avoid Future Faults

• Clean the filter monthly to prevent drain blockages

• Run a vinegar cycle monthly to remove buildup and odors

• Use proper dishwasher detergent (never regular dish soap)

• Keep rinse aid topped up for better cleaning and drying

• Scrape food off dishes before loading

• Don’t overload the dishwasher racks

• Check spray arms regularly for clogs

• Inspect door gasket for wear and tear

By addressing these common dishwasher faults early and performing regular maintenance, you can extend your appliance’s lifespan and avoid costly replacements.