Replacing the Sump-to-Water Inlet Hose on a Bosch Dishwasher

Replacing the sump-to-water inlet hose in your Bosch dishwasher is a straightforward DIY project that can save you the expense of hiring a professional. With the right tools and a systematic approach, your dishwasher can be functioning efficiently in no time.

Benefits of Replacing the Hose Yourself

Opting for a DIY replacement of the sump-to-water inlet hose offers several advantages:

1. Cost Savings: Save money by avoiding service fees for a technician.
2. Quick Resolution: Waiting for a professional appointment can take days, whereas a DIY fix can often be completed in an hour or two.
3. Skill Development: Performing minor appliance repairs builds your confidence and ability to handle future maintenance tasks.
4. Improved Efficiency: A properly functioning hose ensures optimal water flow, improving your dishwasher’s performance and efficiency.

Tools and Materials You’ll Need

• 5/8″ open-ended wrench: For disconnecting the water line.
• 5/16″ nut driver: For loosening hose clamps.
• Phillips screwdriver: For removing panels and racks.
• Torx 20 screwdriver: For accessing internal components.
• Flat-blade screwdriver: For prying off the touchpad control panel.
• Needle-nose pliers: For unscrewing the cover nut.
• Replacement hose: Ensure you have the correct part (00668104). Purchase here.
• Towel: To place under the dishwasher and catch any drips.
• Small container: For collecting water from removed hoses or parts.

Also Read: Troubleshoot the E2 Error in Your Bosch Dishwasher: A DIY Guide

Safety Precautions

Before beginning the repair, follow these steps to ensure safety and avoid damage:

• Unplug the dishwasher or switch off the circuit breaker connected to it.
• Locate and close the water supply valve, which is typically under the sink or behind the dishwasher.
• Check all tools for damage or wear, such as stripped screwdriver heads or frayed handles, to prevent accidents during use.
• Wear gloves to protect against sharp edges inside the dishwasher and on metal parts.
• Clear the area around the dishwasher to avoid tripping hazards.
• Place tools and small parts in a designated container to prevent loss or injury.
• Ensure the towel and container are in place to catch any residual water that might leak when the hoses are removed.
• Mop up any spills immediately to avoid slipping or water damage.
• Use the correct size tools to avoid stripping screws or damaging components.
• Work gently with plastic parts to prevent cracking or breakage.
• Use a voltage tester to confirm there is no power running to the dishwasher before starting the repair.
• Refer to your dishwasher’s user manual for specific instructions on handling components to avoid voiding any warranties.
• Lay down protective mats or towels under and around the dishwasher to prevent scratches or stains on the floor.
• Ensure the area is well-ventilated, especially if using cleaning solutions or encountering any odors from stagnant water in the hoses.

How to Replace the Sump to Water Inlet Hose on a Dishwasher

Removing Dish Racks and Rails

1. Pull out the lower rack completely and set it aside.
2. Lift up on the upper rack to disengage the rollers from the side rails, then pull it out entirely.

Removing the Outer Door Panel

3. Remove the two Phillips screws securing the dishwasher to the countertop.
4. Disconnect the water line from the fill valve using a 5/8″ open-ended wrench, catching drips with a towel.
5. Loosen the hose clamp with a 5/16″ nut driver and detach the drain hose from the air gap or garbage disposal.
6. Remove the three Torx 20 screws along the bottom edge of the door handle.
7. Remove the Torx 20 screws from the sides and top of the inner panel.
8. Lift off the outer door panel by raising it over the inner door hinge and pulling it away.
9. Pull the dishwasher forward slightly to access the inlet.

Detaching the Touchpad Control Panel

10. Use a flat-blade screwdriver to gently pry off the control panel.
11. Let the control panel hang down, still attached to its wiring harness.

Disconnecting Hoses and Removing the Old Hoses

12. Unscrew the cover nut on the water inlet housing with needle nose pliers.
13. Pull the housing away from the tub and lift it to access the hose.
14. Detach the drain hose from the inlet housing and the clamp on the dishwasher base.
15. Twist and maneuver the old inlet hose off the outlet ports, catching water drips with a towel.
16. Inspect the old hose for damage and replace it if necessary.

Installing the New Sump to the Water Inlet Hose

17. Insert the outlet end of the new hose into the drain pump outlet port.
18. Route the hose through the retaining brackets to keep it in place.
19. Push the inlet end of the hose onto the port on the right side of the water inlet housing.
20. Reattach the drain hose to the inlet housing port.

Reattaching Hoses and Housing

21. From inside the tub, tighten the cover nut on the water inlet housing clockwise with needle nose pliers. Avoid over-tightening.
22. Replace the insulation on the inside panel.
23. Slide the dishwasher back into position and open the door.
24. Secure the dishwasher to the countertop using the two Phillips screws.

Reinstalling the Racks and Panels

25. Reinsert the upper and lower racks onto their respective rails.
26. Hold the wiring harness aside and reattach the control panel to the inner door.
27. Reattach the outer door panel with the Torx 20 screws, ensuring the latch functions properly.

Reconnecting Water and Power

28. Thread the water line back onto the fill valve manually and tighten it with the 5/8″ wrench.
29. Attach the drain hose to the air gap or disposal, tightening the hose clamp with a 5/16″ nut driver.
30. Turn on the water supply and plug in the electrical power cord.

Testing for Leaks

31. Run a full wash cycle and inspect all hose connections and the water inlet housing for drips or moisture.
32. If leaks are found, turn off the water supply and power, recheck connections, and retest until no leaks are present.

Also read: How to replace Bosch dishwasher start button 00616599

Maintenance Tips to Extend Hose Life

Preventative care can help you avoid frequent replacements and extend the life of your dishwasher:

1. Regular Inspections: Check hoses periodically for wear, leaks, or buildup.
2. Keep Hoses Clean: Rinse hoses with warm water and mild detergent to prevent debris buildup.
3. Avoid Overloading the Dishwasher: Excess strain on the appliance can lead to component wear, including the hoses.
4. Secure the Hose: Ensure the hose is properly positioned and clamped to avoid kinks or stress points.

Swapping out your Bosch dishwasher’s sump-to-water inlet hose is totally within reach. With a few basic tools and the steps we covered, you can get your dishwasher back to top shape without breaking the bank. Plus, you’ll gain some cool DIY skills that come in handy for future fixes.