Why Does My New Dishwasher Smell Bad? Troubleshooting Guide
Quick answer
First, check if there's food debris in the filter or spray arms. Run a cleaning cycle with dishwasher cleaner or vinegar. If the smell persists, inspect the drain hose and garbage disposal for clogs.
Confirm the symptom
- There is a foul odor coming from the dishwasher.
- The smell is present even after running a cycle.
- The odor is strong and unpleasant.
- Food particles are visible in the dishwasher.
- The dishwasher is not cleaning dishes properly.
Tools and prep
- dishwasher cleaner
- white vinegar
- flashlight
- screwdriver set
- gloves
- towel
- bucket
- dishwasher filter — to replace if necessary
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Prep & safety
- Ensure the dishwasher is turned off and unplugged before starting any inspection or cleaning.
- Clear the area around the dishwasher for easy access.
- Gather all necessary tools and materials.
- Put on gloves to protect your hands during the inspection.
Step-by-step troubleshooting
Check the Filter
Do: Locate the filter at the back of the bottom dish rack and remove it.
Observe: Look for food debris or other blockages.
Means: If the filter is dirty, clean it thoroughly with warm, soapy water.
Next: Reassemble and run a test cycle.
Inspect Spray Arms
Do: Remove the bottom dish rack and check the spray arms for clogs.
Observe: Look for food particles or mineral deposits blocking the holes.
Means: Use a toothpick or small brush to clear any blockages.
Next: Reassemble and run a test cycle.
Run a Cleaning Cycle
Do: Place a dishwasher cleaner tablet or a cup of white vinegar in the dishwasher.
Observe: Run a cleaning cycle according to the manufacturer's instructions.
Means: This will help eliminate odors and clean the interior.
Next: Check if the smell persists.
Check the Drain Hose
Do: Locate the drain hose at the back of the dishwasher.
Observe: Ensure it is properly connected and not kinked or clogged.
Means: If clogged, carefully remove and clean the hose.
Next: Reconnect and run a test cycle.
Inspect the Garbage Disposal
Do: Check the garbage disposal for any food particles or debris.
Observe: Ensure it is clean and functioning properly.
Means: Run the disposal with water to clear any blockages.
Next: Run a test cycle on the dishwasher.
Clean the Interior
Do: Wipe down the interior of the dishwasher with a towel and vinegar.
Observe: Pay special attention to the door seals and edges.
Means: This will help remove any mold or mildew.
Next: Run a test cycle.
Check for Leaks
Do: Inspect the dishwasher for any water leaks.
Observe: Look for water around the base or inside the dishwasher.
Means: If a leak is found, address it according to the manufacturer's guidelines.
Next: Run a test cycle.
Replace the Filter
Do: If the filter is damaged or beyond cleaning, replace it.
Observe: Ensure the new filter matches the old one in size and model.
Means: Follow the manufacturer's instructions for replacement.
Next: Run a test cycle.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Dirty Filter | Food debris and particles can accumulate and cause odors. | High | Easy | dishwasher filter |
| Clogged Spray Arms | Blocked spray arms prevent proper cleaning and can cause smells. | High | Easy | none |
| Mold or Mildew | Moisture can lead to mold growth, causing unpleasant odors. | Medium | Medium | none |
| Clogged Drain Hose | Food particles can block the drain hose, leading to bad smells. | Medium | Medium | none |
| Dirty Garbage Disposal | A clogged or dirty disposal can transfer odors to the dishwasher. | Medium | Easy | none |
| Water Leaks | Leaks can cause mold growth and unpleasant odors. | Low | Medium | none |
| Faulty Seal | A damaged door seal can allow odors to enter the dishwasher. | Low | Medium | dishwasher door seal |
| Old Food Particles | Residue from old food can decompose and cause bad smells. | High | Easy | none |
Parts matching
When replacing parts, ensure they match the specifications of your dishwasher model.
- Dishwasher filter: Match the size and model of your existing filter.
- Drain hose: Ensure the hose is the correct length and fits your dishwasher.
- Door seal: Match the dimensions and type of your current door seal.
- Spray arms: Ensure they are compatible with your dishwasher model.
Consult your dishwasher's manual for specific part numbers and compatibility.
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When to call a pro
- If the smell persists after trying all troubleshooting steps.
- If you suspect a major component failure.
- If there are signs of water damage or leaks.
- If you are uncomfortable performing any of the steps yourself.
- If the dishwasher is under warranty and requires professional service.
- If you need help identifying the exact cause of the problem.
FAQ
How often should I clean my dishwasher?
It's recommended to clean your dishwasher every month to prevent odors and maintain performance.
Can I use bleach to clean my dishwasher?
It's generally not recommended to use bleach in dishwashers as it can damage the interior and seals. Use dishwasher cleaner or vinegar instead.
Why does my dishwasher smell like sewage?
A sewage smell could indicate a clogged drain hose or an issue with the garbage disposal. Check these components for blockages.
What if the smell comes back after cleaning?
If the smell returns, there may be a deeper issue such as a faulty seal or a persistent clog. Consider calling a professional for further inspection.