How to Test Dishwasher Components for Faults

Dishwashers are a lifesaver, taking care of the dirty work so you can kick back and relax. But what happens when your trusty dishwasher starts acting up? Before you call in the pros, you can run a few simple tests to identify the problem. Let’s walk through how to test different components of your dishwasher to find out what’s wrong.

Safety First

Before you start tinkering with your dishwasher, make sure it’s unplugged. If your dishwasher is hardwired, turn off the power at the circuit breaker. Safety goggles and gloves are a good idea, too. Better safe than sorry!

Testing the Dishwasher Door Latch

The door latch keeps the dishwasher closed during the wash cycle. If the latch is faulty, the dishwasher won’t start. Here’s how to check it:

  1. Open and Close the Door: Listen for a click. No click? The latch might be broken.
  2. Inspect the Latch: Look for any visible damage or wear.
  3. Test with a Multimeter: Remove the latch and set your multimeter to the continuity setting. Place the probes on the latch’s terminals. If there’s no continuity, the latch needs replacing.

dishwasher component multimeter testing

Checking the Float Switch

The float switch prevents the dishwasher from overfilling. If it’s stuck or faulty, your dishwasher might not fill properly. Here’s how to test it:

  1. Locate the Float: It’s usually a small plastic piece at the bottom of the dishwasher.
  2. Move the Float Up and Down: It should move freely. If it’s stuck, clean around it to remove any debris.
  3. Test with a Multimeter: Disconnect the wires from the switch. Set your multimeter to the continuity setting and place the probes on the switch’s terminals. No continuity? Time to replace the switch.

Inspecting the Water Inlet Valve

The water inlet valve controls the flow of water into the dishwasher. If your dishwasher isn’t filling, this valve might be the culprit. Here’s how to check it:

  1. Locate the Valve: It’s usually at the bottom of the dishwasher, behind the front kickplate.
  2. Check for Blockages: Inspect the valve for any debris or blockages.
  3. Test with a Multimeter: Disconnect the wires and place the probes on the valve’s terminals. No continuity? You guessed it – the valve needs replacing.

Examining the Heating Element

The heating element is responsible for heating the water. If your dishes aren’t coming out clean, the heating element might be faulty. Here’s how to test it:

  1. Locate the Heating Element: It’s at the bottom of the dishwasher, inside the tub.
  2. Inspect for Damage: Look for any visible damage or breaks.
  3. Test with a Multimeter: Disconnect the wires and place the probes on the terminals of the heating element. A reading of zero or infinity means it’s time for a new element.

Testing the Circulation Pump

The circulation pump moves water through the spray arms to clean your dishes. If your dishes aren’t getting clean, the pump might be the issue. Here’s how to check it:

  1. Listen for Unusual Noises: If the pump is making strange noises, it might be faulty.
  2. Inspect the Pump: Look for any visible damage or blockages.
  3. Test with a Multimeter: Disconnect the wires and place the probes on the pump’s terminals. No continuity? You’ll need to replace the pump.

Checking the Control Board

The control board is the brain of your dishwasher. If multiple components are failing, the control board might be the issue. Here’s how to test it:

  1. Inspect for Burn Marks: Unplug the dishwasher and remove the control board cover. Look for any burn marks or damaged components.
  2. Test with a Multimeter: This one’s tricky and often best left to the pros. However, you can check for obvious signs of failure, like burned spots.

When to Call the Pros

If you’ve run these tests and still can’t pinpoint the problem, it might be time to call in a professional. Some issues are complex and require specialized tools and knowledge. Don’t hesitate to get help if you’re unsure – it’s better to be safe and get the job done right.

Testing your dishwasher components isn’t rocket science, but it does require a bit of know-how and some basic tools. By following these steps, you can identify common faults and potentially save yourself a costly repair bill. Remember, safety first, and if in doubt, call in the experts.

If you’re stuck or need professional help for dishwasher repairs, contact Mobile Appliance Repair Service of Houston at (832) 669-4965 or visit their website at mobile-appliancerepair.com. They’ll get your dishwasher back to its sparkling best in no time!