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Dishwasher Troubleshooting


The main parts of a modern dishwasher are actually fairly few, simple and common across all brands and models. Due to their simplicity, dishwashers are generally very reliable and, in the cases when dishwashers do go wrong, troubleshooting is a simple process which you can do yourself before having to consider repair or replacement of parts with a dishwasher spare. Below is an explanation of the major components and their functions.

Dishwasher doesn't fill with Water

The first thing to check is the water supply. Make sure the water valve from the mains is open. The valve is usually locate under the kitchen sink. Check the dishwashers water inlet valve. It is usually located behind the panel under the dishwasher door. Once accessed (turn off the power first!) check that all the hoses are securely attached and there are no leaks. Whilst you're in there you can also check the drain valve for similar problems as the water might be coming in ok, but draining straight out again. It's also worth checking the dishwashers door seal and catch. If the door isn't properly closed and sealed the dishwasher will not run properly as a safety precaution.

The Dishwasher doesn't Drain Properly

It's normal for a small amount of water to be left in the basin of the dishwasher after a cycle. If the amount of water seems excessive, or doesn't drain over time when left, the drain line could be blocked, or the pump isn't pumping out properly. The first thing to do is remove the strainer and filters from the drain hole in the basin of the dishwasher (whilst they're out you could give them a clean, they can attribute to any blockages themselves). Check if the drain hole is blocked, if it appears to be, try forcing a brush or similar down the clear any blockage. If this doesn't help try checking the drain valve and and hose for obstructions.

Water doesn't get Hot

The heating element's role is to heat/maintain water temperature and to dry the dishes during the dry cycle. If the heating element is malfunctioning, the dishwasher will run cold and your dishes will not be cleaned properly. To test the heating element first disconnect the dishwasher from the electric mains. Locate the heating element in the basin of the dishwasher and note where the two power terminals enter the base. Remove the lower panel below the dishwasher door and locate the two terminals. If the wiring and/or connectors appear damaged or corroded they will require replacement. If you have the know how you can test the element using a voltmeter. If the voltmeter moves to a +/- extreme, or doesn't move at all, then the dishwashers heating element is damaged and will require replacement with a spare.