Good day all,
I happened upon this place while googiling possible probelms with a LG Dishwasher. I am being given this unit and don't have a model number yet. However, my neighbor says that it doesn't get the water hot. Is there a seperate element that heats the water? I would have thought the water connection would have just supplied the water hot already. Am I wrong?
Assuming that this is a "5811" model dishwasher...
LG dishwashers heat water during the MAIN WASH and the FINAL RINSE cycles. No heat is generated for the DRY cycle.
The heat "trapped" in the dishwasher is used for the dry cycle.
Knowing this---it's helpful to run the sink faucet until the running water becomes hot before starting the dishwasher.
Using a RINSE AID is imperative. Rinse aid changes the *surface tension* of water which prevents small droplets of water from clinging to the inside/top of the d/w and from both racks.
In other words--after the final rinse has ended--all of the water will fall to the bottom of the dishwasher before the drain cycle begins. This will leave much less water remaining in the tub before the dry cycle starts. This produces better drying results--although in subsequent model dishwashers--several changes were done to further improve dryness results.
Another important change to LG dishwashers was the changeover from a tar-like thermal insulation coating to a cloth type blanket.
If the front d/w panel is removed and a tar-like coating is seen--disconnect power to the dishwasher and inspect all of wires that route from the bottom of the door up to the detergent dispenser.
One or two wires may have been pulled apart from being imbedded in the tar-compound. If the wires get stuck in this coating--the opening & closing of the door can eventually pull apart a wire. Repair any wiring as needed and wrap the entire wire loom from the bottom of the door to the dispenser with electrical tape. Cut a small section of cardboard and place it between the wire loom and the tar-coating. Re-install the front panel.
If your "5811" dishwasher has been found to have NO heat--the most likely cause of this is a failed HEATING ELEMENT.
Replacing the entire SUMP ASSEMBLY (AJH31428604) is necessary.
DO NOT attempt to replace only the heating element.
On serial numbers of 805 and smaller---the Sump Assembly wash motor is prone to failing---usually triggering an "LE" error.
The original sump assembly in a "5811" dishwasher is part number
6871DD1002B and has been discontinued. Wash motors were greatly improved in the revised sump assembly.
If the Heating Element is found NOT to be at fault with an ohmmeter,then the next likely cause of failure would be the MAIN BOARD.