If your dishwasher smells like eggs, the odor is usually caused by trapped food particles, standing water, or bacteria buildup inside the drain system.
An egg-like or sulfur smell often means something organic is decomposing inside the machine.
Here’s what to check.
1) Food Debris in the Filter
The most common cause of an egg smell is food trapped in the dishwasher filter.
Over time, leftover particles break down and create unpleasant odors.
What to do:
- Remove the bottom rack
- Locate and remove the filter
- Rinse thoroughly under warm water
- Scrub away any buildup
Cleaning the filter often eliminates the smell immediately.
2) Standing Water in the Bottom
If water is not draining completely, it can stagnate and produce a sulfur odor.
Check for:
- Water pooling at the bottom
- Slow draining
- Gurgling sounds
If your dishwasher cannot drain properly, clearing the drain hose or disposal connection may fix the issue.
3) Garbage Disposal Buildup
If your dishwasher drains through the garbage disposal, leftover food inside the disposal can cause smells that travel back into the dishwasher.
Run the disposal with water to flush it out.
4) Mold or Bacteria Growth
Moist environments encourage bacteria growth inside:
- Door seals
- Spray arms
- Interior walls
Wipe down seals and run a hot cycle with a dishwasher cleaner to sanitize the unit.
5) Dirty Air Gap (If Installed)
If your sink has an air gap, it can trap debris and cause odors.
Remove the cover and clean out any buildup inside.
When to Call a Technician
Call for service if:
- The odor persists after cleaning
- Water repeatedly pools at the bottom
- You suspect a drain pump issue
- The smell worsens over time
Persistent odors may indicate a deeper drainage problem.
Quick Recap
If your dishwasher smells like eggs, check:
- The filter
- Drainage
- Garbage disposal connection
- Door seals and spray arms
- Air gap
Most sulfur odors are caused by trapped debris and can be resolved with thorough cleaning.
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