DIY Dishwasher Repair: 5 Common Problems You Can Fix Yourself
At Cavalry Appliance Service and Joe’s three decades of service in Maryland, we've seen nearly every dishwasher problem under the sun. The good news? Most of these issues don't need a technician. In fact, we've found that many dishwasher service calls involve problems homeowners can fix themselves, with just a little guidance.
We created this guide to help you handle the five most common dishwasher problems. With a few simple steps, you can often get your dishwasher running like new again…no tools required, no stress involved.
And if you ever get stuck or want to double-check something, you can always reach out. We're here to help with issues over the phone- no charge and no pressure.
Problem #1: Dishwasher Won't Start
How to Spot It:
No lights or sounds when you press buttons
The door closes but the cycle doesn't begin
Other kitchen appliances work fine, but the dishwasher stays quiet
Step-by-Step Fix:
Step 1: Check the Power Make sure the dishwasher is plugged in tightly. Then, head to your electrical panel and check the breaker. If it's tripped, flip it off and back on again.
Step 2: Close the Door Properly Dishwashers won't run unless the door is fully closed. Open and shut it again. Listen for a solid "click." If it won't latch, wipe the latch area with a damp cloth. Crumbs and grease can prevent a good seal.
Step 3: Try a Reset Like computers, dishwashers sometimes need a reset. Unplug it for five minutes, or flip the breaker off for five minutes if it's hardwired.
Step 4: Look for Error Codes Some models flash lights in a pattern to show a problem. Check your manual or search your model online to decode them.
Step 5: Test the Control Panel Press various buttons. If some work and others don't, or if buttons are sticky, the control panel might need repair.
Call Us If: You've done all the above and still nothing works. You could have a blown thermal fuse or control board issue- things we can easily handle for you, but are a bit tricky without the right tools.
Problem #2: Dishwasher Isn't Draining
How to Spot It:
Water pools at the bottom after the cycle
Dishes smell bad or come out slimy
Water looks dirty with floating bits
Step-by-Step Fix:
Step 1: Reset the Cycle Try hitting the "Cancel" or "Drain" button. Then run a short rinse cycle to see if it drains properly.
Step 2: Clean the Filter This is the most common fix. Remove the bottom rack, twist out the cylindrical filter, and rinse it under warm water. Use an old toothbrush for stubborn gunk.
Step 3: Check the Drain Hose Look under the sink for the drain hose. Make sure it isn't kinked. If you can, disconnect it and flush it with water.
Step 4: Clean the Air Gap If you have a small silver cap next to the sink, twist it off and clean out debris with a toothpick or brush.
Step 5: Run Your Garbage Disposal If the dishwasher drains through your disposal, run it for 30 seconds to clear any clogs.
Call Us If: Water is still standing after these steps. It could be a clogged pump or internal issue that needs expert attention.
Problem #3: Dishes Come Out Dirty
How to Spot It:
Food stuck to dishes after washing
Cloudy glasses or spotty silverware
Greasy feel or leftover soap
Step-by-Step Fix:
Step 1: Load the Dishwasher Correctly Don't overcrowd. Dishes need space for water to reach every surface. Face dirty sides toward the spray arms.
Step 2: Use the Right Detergent Make sure you're using the correct dishwasher detergent. Do not use powder or liquid. Use the pods with three colors.
Step 3: Clean the Spray Arms Lift out the spray arms and rinse them. Use a toothpick to unclog spray holes. Make sure they spin freely.
Step 4: Clean the Filter We mention this a lot, but it's crucial. A dirty filter keeps recirculating dirty water.
Step 5: Use a Dishwasher Cleaner Run an empty cycle with a cleaner like Affresh or Finish. Do this as needed to prevent buildup.
Call Us If: Your dishes are still dirty after trying all this. The wash pump or water inlet valve might be failing and need replacement.
Problem #4: Leaking Water
How to Spot It:
Water around or under the dishwasher
Dripping from the door edges
Nearby cabinets getting wet or warping
Step-by-Step Fix:
Step 1: Load with Care Too many items can push water toward the door. Keep tall items away from the door area.
Step 2: Use Proper Detergent Too much soap or rinse aid equals too many suds, which equals leaks. Stick to recommended amounts of dishwasher-specific detergent.
Step 3: Inspect the Door Seal Wipe down the rubber gasket around the door. Look for cracks or tears. If you feel comfortable, replace it if it's damaged, or call us at 252-772-1264 and we can replace it for you.
Step 4: Check the Level A tilted dishwasher can cause leaks. Use a level and adjust the feet so it sits evenly.
Step 5: Check the Hoses Under the sink, check all hose connections. Tighten or replace if you see cracks.
Call Us If: Leaks continue, especially from underneath. It could mean a failed pump seal or internal component issue.
Problem #5: Strange Noises
How to Spot It:
Grinding, buzzing, or humming sounds
Rattling or banging during cycles
Noises that are getting worse
Step-by-Step Fix:
Step 1: Pause and Look Open the dishwasher mid-cycle and check for foreign objects like glass shards or utensils that slipped through.
Step 2: Check the Spray Arms Spin them by hand. If they hit something, move the item. If they don't spin easily, remove and clean them.
Step 3: Rearrange the Dishes Loose plastic items can vibrate. Make sure nothing's bumping into the spray arms or each other.
Step 4: Listen to the Drain Hearing noise during draining? Clean the filter again. A struggling pump can get loud.
Call Us If: Grinding, squealing, or persistent humming continues. This could mean worn bearings or a failing motor.
Bonus Tip: Your Free Lifeline
Here's something unique: We offer free text support. If you're in the middle of a repair or need advice, just send us a message at 252-772-1264. We'll get back to you with honest guidance as soon as we can. Remember that, if we are out running service calls, it could be a little bit before we can respond. Sometimes we can save you a service call, and sometimes we'll tell you it's time for backup.
Final Thoughts
Most dishwasher problems are simple when broken down into steps. With just a bit of patience, you can save time, money, and the hassle of calling in a technician.
That said, don't push your limits. We're always here to help with friendly advice or professional repairs. You're capable of more than you think, and we're happy to help when you need a hand.
Cheers,
Your Cavalry Appliance Team