How to Fix a Dishwasher That Is Not Filling with Water

If your dishwasher is running but no water is coming in — or the cycle is completing but dishes come out dirty and dry — the dishwasher isn't filling properly. This is a common fault and in many cases it's something you can diagnose and fix yourself. Here's a step-by-step guide.

Step 1: Check the Water Supply

The most common cause is simply that the water supply tap has been turned off. The water inlet tap is usually located under the kitchen sink. Turn it fully anti-clockwise to open. Run a cycle and see if water flows in. It sounds basic, but it's easily missed after kitchen work or a move.

Step 2: Check the Water Inlet Hose

Inspect the inlet hose (the hose running from the tap to the dishwasher) for kinks or bends. Even a partial kink can restrict flow enough to cause problems. Straighten any kinks and ensure the hose is not pinched behind the appliance.

Step 3: Check the Inlet Hose Mesh Filter

At the point where the inlet hose connects to the back of the dishwasher, there's a small mesh filter that prevents debris from entering. This can clog over time. Unscrew the hose from the dishwasher (turn off the tap first and have a towel ready) and inspect the mesh screen. Clean it under running water with a soft brush if it's clogged, then reattach.

Step 4: Test the Door Switch

Dishwashers won't fill unless the door is properly latched and the door switch is engaged. If the door latch is faulty, the machine may appear to run (you hear the motor) but won't fill. Open and firmly close the door and try again. If the latch feels loose or the door doesn't click shut, the latch mechanism may need replacing.

Step 5: Check the Float Assembly

Inside the bottom of the dishwasher tub there's a small plastic float (it looks like a dome or mushroom cap). This rises with the water level to signal the machine to stop filling. If it's stuck in the raised position (sometimes from debris underneath it), the dishwasher thinks it's already full and won't fill. Lift the float gently and clean underneath it.

Step 6: Check the Water Inlet Valve

The water inlet valve is an electrically operated solenoid valve that opens to let water in when the dishwasher calls for it. If the valve has failed, no water will enter regardless of everything else being correct. You can test this with a multimeter (checking for continuity) or simply replace it — it's typically a $30–60 part and straightforward to swap out.

When to Call a Technician

If the inlet valve is faulty and you're not comfortable replacing it yourself, a technician can do the job in about 30 minutes. If the control board has failed (the signal to open the valve never comes), repair may not be cost-effective on an older machine.

Upgrading Your Dishwasher?

If your dishwasher is old and repairs are piling up, Oceania Appliances has quality refurbished dishwashers starting from an affordable price with a 3–6 month warranty. Visit 2/14 Centre Place, Wetherill Park or browse online — open 7 days, 10am–8pm.