How to Replace a Dishwasher

How to Replace a Dishwasher - Page 2

Replace an old dishwasher with a new efficient appliance and enjoy its sharp new looks and better performance. Learn the step-by-step instructions and the tools and materials needed to do the job right.



 How to Replace a Dishwasher

How to Replace a Dishwasher - Page 2

Replace an old dishwasher with a new efficient appliance and enjoy its sharp new looks and better performance. Learn the step-by-step instructions and the tools and materials needed to do the job right.

  • Step 4 : Remove the electrical wiring

    The electrical supply is connected to a junction box on the side of the unit. Open the cover and loosen the wire nuts joining the wires. Loosen the clamp on the side of the junction box and pull the cable out of the box so it's free and can be removed from the cabinet.

  • Step 5 : Reconnect the electrical wiring

    Follow the wiring instructions described in the installation manual for the new unit. The new dishwasher is wired in exactly the same way as the old one. Like colored wires are joined together with wire nuts. There will be a black, white and a green or bare copper ground wire. If necessary, use a wire stripper to remove an inch of insulation from the end of the wires in the dishwasher's junction box. Then twist the matching wires together with pliers and thread a wire nut on each wire. Join the green wires together or secure the green wire to the grounding screw on the new unit.

  • Step 6 : Reconnect the drain hose

    Reconnect the drain hose

    Connect the rubber drain hose to the outlet on the bottom of the dishwasher base. Unless the 5/8-inch hose is old and has begun to crack, you can reuse it. If you decide to replace it, purchase a dishwasher drain hose or automotive heater hose that is designed to handle detergent-laden hot water. You may also want to replace the hose clamps if they are rusty. Tighten the hose clamp securely with a slotted screwdriver.

    Connect the other end of the hose to the drain fitting under the sink or the dishwasher connector on the side of the garbage disposer. Tighten the hose clamp with a slotted screwdriver.

  • Step 7 : Reconnect the water supply

    Reconnect the water supply

    The copper supply line is connected to the water control solenoid located on the lower front of the dishwasher. Check the installation manual. Many dishwashers require a dishwasher ell, a right angle fitting with a 5/8-inch male pipe thread on one side and a 3/8-inch compression fitting on the other. If so, remove it from the old unit and re-install by screwing it on to the solenoid and seal the joint with Teflon tape.

    Slip the end of the copper water supply line into the dishwasher ell and carefully thread on the compression nut by hand. Then tighten the nut with a wrench.

  • Step 8 : Test the unit for leaks

    Turn on the electrical power and water supply. Check the compression fitting at the water control solenoid for leaks. Then run the dishwasher through a wash cycle and take a careful look under the unit for leaks. You may have to tighten the hose clamps on the drain hose or the compression nut at the water control solenoid.

  • Step 9 : Push the new unit into the cabinet

     Push the new unit into the cabinet

    Push the new dishwasher unit into the cabinet being careful not to kink the drain hose or copper tubing. Use a carpenter's level to assure that it's level so all the water drains out. Use the mounting brackets to secure it in place.

  • Step 10 : Reinstall the trim

    Fasten the molding or other trim to complete the installation.

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