Dishwasher Smells Bad? Here’s What to Check

If your dishwasher smells bad, the cause is often leftover food particles, standing water, filter buildup, or moisture trapped inside the appliance. Because dishwashers are warm and damp after each cycle, bad odours can develop quickly if routine cleaning is neglected.

At EAS Repair & Installation, we provide professional dishwasher repair and appliance service across Toronto and the GTA. If your dishwasher has a persistent smell, there are a few common places to check first.

Why a Dishwasher Smells Bad

Dishwasher odours usually come from one or more of the following:

• Food debris trapped in the filter
• Buildup around the door gasket
• Standing water in the base of the dishwasher
• Drain or clog issues
• Moisture and residue left inside after cycles

When these problems are left alone, the smell can become stronger and may keep coming back even after running a wash cycle.

How to Clean the Inside of a Dishwasher

Cleaning the interior can help remove residue and freshen the appliance. A basic maintenance routine may include:

1. Remove any visible food debris from the bottom of the dishwasher
2. Wipe the interior walls and door edges with a soft cloth
3. Clean around the door gasket where buildup often collects
4. Run an empty hot cycle with a dishwasher-safe cleaner or a manufacturer-approved cleaning method

If you use vinegar or baking soda, use them carefully and avoid combining cleaning products in ways not recommended by the manufacturer. Always check the owner’s manual if you are unsure what is safe for your dishwasher model.

How to Clean a Dishwasher Filter

The filter helps catch food particles and prevent them from recirculating or causing drain problems. If the filter is dirty, it can easily contribute to bad smells.

1. Remove the bottom rack
2. Locate the filter assembly
3. Remove it according to your dishwasher model instructions
4. Wash it gently with warm soapy water
5. Use a soft brush if needed to remove stubborn debris
6. Reinstall the filter securely

Check for Drain or Clog Problems

If your dishwasher smells bad and also drains poorly, a clog may be part of the problem. Odours can come from food residue trapped in the drain system, garbage disposal connection, or nearby plumbing.

Common places to check include:

• The dishwasher filter area
• The dishwasher drain connection
• The garbage disposal, if the dishwasher drains through it
• The air gap, if your kitchen has one

If standing water remains in the dishwasher after a cycle, professional service may be needed to check for a blockage or drain issue.

How to Help Prevent Dishwasher Odours

• Clean the filter regularly
• Remove large food particles before loading dishes
• Wipe the door gasket and edges
• Run cleaning cycles periodically
• Leave the dishwasher slightly open after use when possible so moisture can escape

When to Call for Dishwasher Repair

If your dishwasher still smells bad after cleaning the filter, interior, and drain areas, there may be a deeper issue such as standing water, drainage problems, hidden buildup, or another mechanical concern. In that case, professional service can help identify the source more accurately.

EAS Repair & Installation provides dependable dishwasher service for homes, condos, and rental properties across Toronto and the GTA.

Book Dishwasher Repair

If your dishwasher has a persistent bad smell or is showing other signs of trouble, contact EAS Repair & Installation for professional diagnosis and service.

EAS Repair & Installation
Phone: (905) 773-3668
Email: info@easrepair.ca
Book Online: Contact Us