Dishwasher Hums but No Water: Ultimate 5-Step Guide

If your “dishwasher hums but no water” fills it, you’re in the right place. This common problem can cause a great deal of frustration, but with this guide, we’ll walk you through the steps to rectify this issue.

Dishwasher Hums but No Water
From by Castorly Stock

Step 1: Verify Water Supply

The first thing you should check if your dishwasher hums but no water enters it is the water supply. Make sure the water supply valve under your sink is turned on. This valve is typically located on the wall beneath your sink and is a round or lever-shaped knob that you can turn clockwise to shut off and counterclockwise to turn on.

Step 2: Check the Water Inlet Valve

If your water supply is on and your dishwasher still hums but no water enters it, the next step is to check the water inlet valve. Unplug the dishwasher, locate the valve (it is usually at the bottom behind a panel), and check if it’s clogged or faulty. You might need to clean it or replace it if necessary.

Tools you’ll need:

  • Replacement inlet valve that is compatible with your dishwasher model
  • Screwdriver
  • Adjustable wrench
  • Towel
  • Bucket

Step-by-Step Guide

  1. Turn Off the Power: Safety is the top priority. Unplug your dishwasher or turn off the power at the circuit breaker.
  2. Turn Off the Water Supply: Locate the water supply valve under your sink or in the basement and turn it off to prevent any leaks while you’re working.
  3. Remove the Dishwasher’s Lower Panel: This is also known as the toe kick or access panel. It’s usually held in place by a few screws.
  4. Locate the Inlet Valve: The inlet valve is usually located near the front of the dishwasher. Look for a part with one water hose attached to it.
  5. Place a Bucket Underneath: Before you remove the inlet valve, place a bucket underneath to catch any water that might spill out.
  6. Disconnect the Water Supply Line: Using your adjustable wrench, disconnect the water supply line from the inlet valve.
  7. Disconnect the Wiring: Disconnect the wiring from the inlet valve. It might be connected with a plug or a wire nut. Be careful not to pull on the wires, instead, pull on the plug or wire nut.
  8. Remove the Inlet Valve: The inlet valve will be attached to the dishwasher with a bracket and a few screws. Use your screwdriver to remove the screws and the inlet valve.
  9. Install the New Inlet Valve: Attach the new inlet valve where the old one was located using the screws and bracket.
  10. Reconnect the Wiring: Reconnect the wiring to the new inlet valve.
  11. Reconnect the Water Supply Line: Reconnect the water supply line using your adjustable wrench.
  12. Reattach the Lower Panel: Attach the lower panel back onto the dishwasher.
  13. Turn On the Water Supply: Turn the water supply back on and check for any leaks.
  14. Turn On the Power: Plug your dishwasher back in or turn on the power at the circuit breaker.
  15. Test the Dishwasher: Run a short cycle to make sure everything is working correctly.
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Remember to refer to your dishwasher’s user manual for any specific instructions. If you’re uncomfortable performing this task, you should hire a professional.

Step 3: Inspect the Float Assembly

The float assembly is another component to examine if your dishwasher hums but no water enters it. The float assembly is a safety device designed to prevent the dishwasher from overflowing. If it’s stuck in the ‘up’ or ‘safe’ position, it might prevent water from entering the dishwasher. Make sure it moves up and down freely and is not stuck in one position.

For more articles on dishwashers, click here: Dishwasher Problems and Solutions: Your Ultimate Guide to Hassle-free Dishwashing

Step 4: Assess the Door Switch

The door switch ensures that the dishwasher doesn’t operate when the door is open. If it’s faulty, the dishwasher may hum but no water will fill it. Inspect the switch for any damage and replace it if necessary.

Step 5: Consult a Professional

If you’ve followed all these steps and your dishwasher still hums but no water enters it, it’s time to consult a professional. They have the tools and knowledge to handle more complex issues that may be causing the problem.