GE dishwasher smells bad or musty: for odors in the GE Profile PDT785, the manual gives four separate answers. A slight odor during the dry portion the first time Dry Boost is used comes from heating new parts, is normal and disappears in a short time. For a dishwasher that smells stale, the UltraFresh option runs a smart algorithm that works continuously, with the fan, water valve and drain pump running at intervals, and it can be turned on or off with its pad. To clean and deodorise the interior, use citric acid (kit WD35X151), Cascade Platinum Dishwasher Cleaner or Finish Dishwasher Cleaner, which break up mineral deposits and remove hard water film and stains.
Differential
Likely causes of “GE dishwasher smells bad or musty”, and how to tell them apart
- 1
New parts heating during Dry Boost
What separates it A slight odor the first time Dry Boost runs that fades
How to confirm No action is needed; it disappears in a short time
- 2
Food in the filters
What separates it There is a stale smell with debris in the tub because of food in the filters
How to confirm Clean the Ultra Fine and Fine Filters, and run a rinse
- 3
Hard water film and mineral deposits
What separates it There is a chalky look and a musty smell because of hard water film and mineral deposits
How to confirm Run citric acid or a dishwasher cleaner as the Care and Cleaning section says
- 4
Standing water from a drain fault
What separates it A stagnant smell with water left in the tub
How to confirm Clean the air gap and clear the drain
Before you touch a setting
Record this first — changing settings destroys the evidence
- When the smell appears: during dry, at door opening or between cycles
- Whether the dishwasher has UltraFresh and whether it is on
- Whether water is left in the tub
Try in this order
0 of 5 completedRecognize the new-parts odor
ReversibleGE says a slight odor from the unit during the dry portion of a cycle is normal the first time Dry Boost is used and disappears in a short time.
Clean the filters
ReversibleInspect and clean the filters every other month or more depending on usage. Rinse them with warm soapy water and a sponge.
Clean the interior
ReversibleUse citric acid kit WD35X151, Cascade Platinum Dishwasher Cleaner or Finish Dishwasher Cleaner to break up mineral deposits and remove hard water film and stains.
Use UltraFresh
ReversiblePressing the UltraFresh pad activates the smart algorithm and lights the LED above it; press again to turn it off. With it on the fan, water valve and drain pump may run at intervals outside a cycle.
Check the air gap
ReversibleA clogged air gap leaves water standing; clean it as the Care and Cleaning section shows.
Model-specific
What is true of this model and not of its siblings
- Interior care notes
- Clean the exterior with a clean, soft, lightly dampened cloth and dry thoroughly. Integrated door panel models (model numbers ending in II) use a custom door panel that follows the cabinet maker's cleaning advice. Stainless steel tub and inner door scratches do not affect function or durability.
- Parts for this problem on the PDT785 (RepairClinic, 2026-09-21)
- user cleanable fine filter and basket asm, part number WD12X25995, at $27.56; high loop drain hose from pump to drain hose ext, part number WD24X27778, at $16.47; check valve, part number WD12X25476, at $7.99; door vent seal, part number WD08X10092, at $30.09.
- Other models this page answers
- These steps also fit models PDT755, GDP665, GDT670, GDT650, GDF650, GDF510.
Stop boundary
When this stops being a self-service repair
- !If the smell persists after filters, citric acid and a clear drain, contact GE Appliances service
- !If the smell is burning, stop the dishwasher and switch off the breaker
Evidence ledger
Sources behind this answer
GE Appliances' own support articles for dishwashers; the article for this page is named in the page's notes.
GE's own page for the Profile PDT785 with its installation guide and specifications.
Parts and list prices as shown on RepairClinic's parts search for this model number on 2026-09-21.
Exact questions
Common questions
Is a smell during Dry Boost normal?+
Yes the first time; it is caused by the heating of new parts and disappears in a short time.
What does UltraFresh do?+
It works continuously to help reduce odors, running the fan, water valve and drain pump at intervals.
Why is there water in the bottom outside a cycle?+
UltraFresh may add and drain water at intervals.
How do I clean the interior?+
Use citric acid, or a Cascade Platinum or Finish dishwasher cleaner.
How often do I clean the filters?+
Every other month or more depending on usage.
Where do I order citric acid?+
GE Appliances kit WD35X151 through GE Parts.
Is the tub stainless steel?+
Yes. The stainless steel tub and inner door will not rust or corrode if scratched.
Does Microban help?+
The UltraFresh System includes components made with Microban antimicrobial technology, on some models.