Frequent use of your dishwasher will cause some component parts to wear out. Just because your dishwasher isn't heating correctly doesn't mean it is the end of the road for it. Instead of spending a considerable amount of money purchasing a new dishwasher, consider replacing your heating element for a fraction of the cost of getting a new one.
You can do this job on your own with the proper tools and instruction. Be sure that before you begin work on your dishwasher you disconnect the power from the unit by turning the circuit breaker OFF at the main panel in order to avoid getting a dangerous electrical shock.
Step 1 - Locate Heating Element
Your heating element is going to be located in the tub of your dishwasher beneath the lower dish rack. You will recognize it by its thin circular shape. If there is a cover directly beneath the lower dish rack, you will need to use the appropriate screwdriver to remove the cover to expose the heating element. After uncovering the heating element, you will see the two metal terminals at each end of the unit which will extend down into the lower cavity of the dishwasher.
Step 2 - Access the Wiring
After locating the heating element, you will need to gain access to the unit's wiring. To do this, remove the kick plate from the dishwasher by removing the retaining screws. Once inside, look for the area in which the wires are connected to the two terminals you recognized at the ends of the heating element. Using your sticky labels, mark the wires before you attempt to remove them to ensure you place them correctly onto the new heating element.
Step 3 - Remove Wires from Terminals
The wires are connected to the terminals with a plastic coated or metal slip-on or an eyelet connector. To ensure you don't damage the wires or the connectors, use your needle-nose pliers to grasp the slip-on connectors to remove the wires from each terminal. If you should pull on the wires themselves, you will separate them from the slip-on connectors.
Step 4 - Disconnect Terminals
You will now need to disconnect the wires from the heating element. The eyelet wire connectors are secured by a lock nut. Use an appropriate size wrench to remove the lock nuts and remove the wires from the heating element's terminal.
Step 5 - Remove Heating Element
When the heating element wires are free from the terminals, you can now remove the heating element. Be careful as you lift the heating element out of the dishwasher so as not to cut your hands on other components inside the dishwasher. When the heating element is out, dispose of it properly.
Step 6 - Install New Heating Element
Put the wires through their appropriate openings in the dishwasher and then secure the heating element into its position. Once the heating element is seated, attach the wires to the heating element using the same lock nuts and tighten into place.
Step 7 - Replace Kick Plate and Cover
The heating element and wiring is now complete. Secure the kick plate onto the dishwasher. Open the door of your dishwasher and place the cover over the heating element. Once this is done, you can place the lower dishwasher rack back in position. Restore the power to your unit and conduct a test run.