Replacing the sump assembly in your Bosch dishwasher is a manageable DIY task that can save you time and money. Here’s a step-by-step guide to help you through the process.
What is the Sump Assembly?
The sump assembly is located at the bottom center of the dishwasher. It holds the circulation and drain pumps and supports the lower spray arm. A common reason to replace the sump is if it develops a crack, leading to water leakage.
Tools and Materials You’ll Need
- 5/8-inch open-end wrench
- 5/16-inch nut driver
- Phillips screwdriver
- Torx T20 screwdriver
- Small flat-blade screwdriver
- Needle-nose pliers
- Replacement sump assembly (Ensure compatibility with your specific model before installation.)
- Small container to catch water
- Towels for absorbing leaks
- Gloves to protect your hands
Safety Precautions
Before starting, ensure your safety by following these steps:
- Power Off the Appliance: Unplug the dishwasher or turn off the circuit breaker to eliminate the risk of electric shock.
- Shut Off the Water Supply: Turn off the water valve to prevent leaks during the repair.
- Cool Down the Appliance: If recently used, allow the dishwasher to cool before starting.
- Keep the Workspace Safe: Work in a clean, well-lit area free from clutter. Keep children and pets away from the workspace.
- Avoid Wet Conditions: Ensure your hands and work area are completely dry to avoid slipping or electrical hazards.
- Handle with Care: Be gentle when removing or installing parts to prevent damage or injury.
- Use Protective Gear: Wear insulated gloves to shield your hands from sharp edges or debris. Safety glasses are also a good idea if you’re working near chemicals or dusty components.
Also read: Fix Your Bosch Dishwasher: How to Troubleshoot and Clear Error Code E01
How to Replace the Sump Assembly in a Dishwasher
Preparation
- Turn off the dishwasher and unplug it.
- Shut off the water supply.
- Remove the lower dish rack by pulling it out and lifting it off.
- Remove the upper dish rack by pulling it out and lifting it off.
Detaching the Dishwasher
- Use a Phillips screwdriver to remove the screws securing the dishwasher to the countertop.
- Gently pull the dishwasher away from the cabinets, leaving the hoses and wiring attached.
- Detach the water supply line using a 5/8-inch open-end wrench.
- Loosen the hose clamp on the drain hose with a 5/16-inch nut driver and detach the hose.
Removing the Door Panels
- Unscrew the three Torx T20 screws at the bottom of the door panel.
- Pry off the touchpad panel above the door handle with a flat-blade screwdriver.
- Open the door, remove the top and side Torx screws, and slide the outer door panel upward, resting it on the open door.
- Remove the inner door panel by unscrewing the remaining Torx screws.
- Disconnect the touchpad wiring and lift off the outer door panel.
Accessing the Sump Assembly
- Tilt the dishwasher forward and remove the two screws at the bottom rear using a Torx driver.
- Pull the dishwasher out completely, feeding hoses and wiring through the opening.
- Lay the dishwasher on its back.
- Detach the door springs and cables using needle-nose pliers to remove the spring cables, guide sleeves, and tension adjusters.
- Remove the bottom access panel by unscrewing the Phillips screws.
- Remove the insulation and support bracket underneath.
Removing the Tub
- Lift the two release tabs on the bottom of the dishwasher to slide the tub off.
- Stand the dishwasher upright to access the sump assembly.
- Remove the lower spray arm and filter basket from inside the tub.
Detaching the Old Sump Assembly
- Disconnect all wiring plugs and drain hoses attached to the sump assembly underneath using a flat-blade screwdriver to release locking tabs.
- Detach the circulation motor wiring plug and hose clamp, then rotate the motor counterclockwise to remove it.
- Detach the turbidity sensor by releasing its locking tab and unscrewing it counterclockwise.
- Remove the four Torx T20 screws securing the sump assembly.
- Carefully detach the sump assembly from the inlet tube.
- Remove the drain pump and suction cap from the old sump assembly.
Installing the New Sump Assembly
- Transfer the drain pump and suction cap to the new sump assembly.
- Apply dish soap to the o-ring seal on the new sump assembly for easier installation.
- Align the sump assembly with the mounting holes and inlet tube opening.
- Secure the sump assembly with the four Torx T20 screws.
- Reinstall the turbidity sensor by screwing it clockwise until secure.
- Reattach the circulation motor and align the hose properly, securing it with the hose clamp.
- Reconnect all wiring plugs and drain hoses to the new sump assembly.
Reassembling the Dishwasher
- Slide the dishwasher tub back into the outer cabinet, ensuring release tabs click into place.
- Reinstall the insulation and access panels underneath the dishwasher.
- Reconnect any wiring that was detached earlier.
- Reattach the door springs and cables to the tension adjusters.
- Place the guide sleeves back on the mounting posts.
- Connect the cables to the door hinges and secure them in place.
- Reinstall the inner door panel using the original Torx screws.
- Reconnect the touchpad wiring plug.
- Slide the outer door panel back into place and secure it with Torx screws.
Final Steps
- Set the dishwasher upright and slide it into the cabinet opening.
- Feed hoses and wiring back through the openings.
- Secure the bottom rear screws to stabilize the dishwasher.
- Reinstall the upper and lower dish racks.
- Secure the dishwasher to the countertop with the Phillips screws.
- Attach the drain hose and tighten the hose clamp.
- Reconnect the water supply line and tighten it securely.
- Plug the dishwasher back into the electrical outlet.
- Turn on the water supply.
- Run a test cycle to verify functionality and check for leaks.
Also read: How to replace Bosch dishwasher sump assembly 00668102
And there you have it—your Bosch dishwasher is back in action, leak-free, and ready to handle the toughest dish loads! Now that your appliance is back to working order, you can enjoy clean dishes without the stress of puddles on the kitchen floor.
Remember to keep an eye on your dishwasher’s performance, and don’t hesitate to tackle DIY repairs when needed. With the right tools, a bit of patience, and this guide, you’re well-equipped to handle many common dishwasher issues.