Direct answer
For the KitchenAid KDTM804 dishwasher, prove power, door latch, control lock, delay and Start/Resume behavior first. First, reset the breaker once and close/latch the door firmly.
What this covers
- KitchenAid KDTM804 dishwasher (KDTM804K*)
- KitchenAid dishwasher; FreeFlex rack, ProWash, fan/heat drying and filtration vary by model.
- The specific fault this record addresses: will not start or respond
What it does not cover
- ×The same symptom on a different KitchenAid product line, which has its own record and its own cited source
- ×An on-screen error code whose meaning has not been checked against this exact model's manual
- ×Live electrical, gas, sealed-system, internal battery-cell or structural repair — a technician boundary, not a self-service step
Differential
What actually causes this, and how to tell them apart
These are ordered by how often each one is the answer, not by how easy it is to try. The point of the middle column is that two causes producing the same headline symptom rarely produce the same detail — that detail is what tells you which one you have before you change anything.
- 1
The door is not latched positively
What separates it The panel lights but pressing Start produces nothing, or the machine beeps and stops. The latch has to close a switch before anything runs.
How to confirm Push the door firmly until it latches. A slightly proud door looks closed and is not.
- 2
Control lock is active
What separates it A lock icon shows on the panel and buttons beep without responding. Easily triggered by wiping the panel down.
How to confirm Clear it with the model's documented button-hold sequence, which differs between brands.
- 3
A delay start is running
What separates it The display shows a countdown or a delay indicator rather than cycle progress, and the machine will start later on its own.
How to confirm Cancel the delay explicitly rather than pressing Start repeatedly.
- 4
The previous cycle was interrupted and needs resuming or cancelling
What separates it The machine resumes a partly finished cycle rather than starting the newly selected one, or refuses a new selection.
How to confirm Run the documented cancel or drain sequence to clear the interrupted cycle before selecting a new one.
- 5
No power is reaching the machine
What separates it The panel is completely dark. Many dishwashers are wired to a switch under the sink or a dedicated breaker rather than a visible plug.
How to confirm See no-power — check the breaker and any switch under the sink before assuming a control fault.
Before you touch a setting
Record this first — changing settings destroys the evidence
Every item below stops existing the moment a reset, re-pair or settings change is made. Written down first, they are what separates the causes above; recovered afterwards, they are guesswork.
- Whether the panel is dark, or lit but unresponsive — these are entirely different problems.
- Whether a lock icon or a delay countdown is showing.
- Whether the door latches with positive engagement rather than just resting closed.
- Whether the previous cycle completed normally.
Push the door until it latches positively and try Start again
ReversibleA door resting closed without engaging the latch switch stops everything.
Check the panel for a lock icon or a delay countdown
ReversibleBoth are far more common than a control failure, and both clear with a documented sequence.
Run the documented cancel or drain sequence to clear an interrupted cycle
ReversibleA machine holding a part-finished cycle will not accept a new selection.
Check the breaker and any switch under the sink if the panel is dark
ReversibleMany dishwashers are hard-wired to a wall switch rather than a visible plug.
Start and cancel one empty cycle to confirm normal control response
ReversibleConfirms the fix before committing a load.
Model-specific
What is true of this model and not of its siblings
Generic advice for the product line fails here. Each item below is a property of this specific model family that changes which of the steps above apply to you.
- Model scope
- KDTM804K*. KitchenAid dishwasher; FreeFlex rack, ProWash, fan/heat drying and filtration vary by model.
- Drying — ProDry (fan + heating element), top tier
- The top KitchenAid with the strongest ProDry (element + fan) drying, including plastics. Keep plastics off the tub floor; keep rinse aid filled.
- Wash & racks
- Premium stainless tub, FreeFlex 3rd rack, advanced wash and very quiet operation. A manual filter must be cleaned periodically.
- Drain path
- 'Won't drain' is usually the filter, drain hose, air gap, or an un-removed disposer knockout plug (Whirlpool-built platform).
- Symptom boundary
- This record covers KitchenAid KDTM804 dishwasher when it will not start or respond. A different symptom on the same hardware, or this symptom on a different KitchenAid product line, has its own record with its own causes and its own cited source.
Stop boundary
When this stops being a self-service repair
Continuing past any one of these costs more than the repair saves — in safety, in warranty, or in evidence a technician needs.
- !Stop for hot wiring, smoke, arcing, or repeated breaker trips.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Where the manufacturer's article stops. KitchenAid Product Help publishes this as "Not Starting or Operating - Dishwasher". the maker's article for a dishwasher that will not begin a cycle. Probed 2026-08-23: title-verified against a hard-404 control. What that article does not carry is the model boundary — it is written for a product line, and KDTM804K* is the scope applied here. Where a control label, terminal, indicator pattern or reset sequence differs on your unit, the manual for that exact model is the authority, not this page and not the article.
Exact questions
Common follow-ups
My KitchenAid KDTM804 cycle runs very long.+
Long cycles are normal on the Auto/ProWash and heavy modes — the sensor tests soil and adjusts, and ProDry adds heated drying time, for a thorough result. Use a one-hour or express cycle when you do not need the full clean. If it seems to hold at one time, that is usually the sensor waiting while it heats water; a hotter incoming supply shortens it.
I press Start and nothing happens, but the lights are on.+
Lights on means power is fine, so it is a permission problem. Push the door until it latches positively — a door resting closed without engaging the latch switch is the most common cause — then check the panel for a lock icon or a delay countdown, both of which stop a cycle starting and both of which clear with a documented button sequence.
Does this answer apply to every KitchenAid model?+
No. It is scoped to KDTM804K*. KitchenAid dishwasher; FreeFlex rack, ProWash, fan/heat drying and filtration vary by model.
What should I record before troubleshooting won't start or not responding?+
Record the complete model identifier, exact message or indicator, software/firmware where visible, the operating stage and what still works.
Why is a factory reset not the first step?+
A reset can erase accounts, networks, maps, schedules or preferences without distinguishing won't start, not responding. The ordered checks preserve that evidence.
When should I stop and use qualified service?+
Stop for hot wiring, smoke, arcing, leaks or repeated breaker trips.
Answer for the exact device and software version shown above.