A Whirlpool dishwasher that will not start can mean anything from a lifted door latch to a failed control board, and the WDT700 and WDF500 series make it easy to narrow down: the F#E# fault code system reports the function group and the specific error whenever the board sees one. Work from the simplest power-path checks toward the electronics.
Most Likely Cause#
Most likely: the door latch or its microswitch is not confirming a closed door, so the control never lets the cycle begin. It is the single most common "dead" complaint, and it is easy to mistake for a bigger failure when the latch simply is not making contact.
Do You Have the Right Tools?
Water pressure gauge ($60), spray arm tester, float switch multimeter ($85), and drain inspection camera. Our technician arrives with $3,000+ in professional tools — your diagnostic is free.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Ranked Causes#
| Cause | Share | What you see | First check |
|---|---|---|---|
| Door latch / primary start signal | 30% | Panel lights but nothing happens on Start | Latch W10862259 microswitch continuity |
| Control board signal | 20% | No response, or an F#E# code on the display | Board W11305310 relay and program |
| Water supply | 15% | Starts then aborts, or will not fill | Inlet valve W10872255 screen and 20 PSI feed |
| Drain restriction | 15% | Won't begin with water still in the tub | Filter and drain pump W10876537 |
| Door seal / latch alignment | 12% | Door feels shut but the cycle won't arm | Gasket seat and latch strike |
| Sensor or thermostat drift | 8% | Odd behavior with no clear cause | Diagnostic-mode cycle timing |
Safety Protocol#
- Cut power at the breaker before inspecting any internal component.
- If the fault involves water, close the supply valve under the sink first.
- Do not defeat the safety switches — the F#E# system exists to stop the machine before a component is damaged.
- Let heated parts cool before you touch them; the Heated Dry element runs above 350 degrees.
Safety First — Know the Risks
Live 120V wiring in a wet environment is one of the most dangerous DIY scenarios. Water + electricity = serious shock risk. Our techs are licensed and insured — let them handle the risk.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Step-by-Step Checks#
- Confirm power and the door. Verify the outlet or breaker is live, then press the door firmly until the latch clicks. A latch that does not seat is the most common no-start cause.
- Read any code. If an F#E# code shows, note it — it identifies the function group and points straight at the failed subsystem.
- Test the latch switch. Meter the microswitch on latch W10862259 for continuity as the door closes; no continuity means a failed switch.
- Check the water side. A clogged screen on inlet valve W10872255 or supply below about 20 PSI can make the machine start and immediately abort.
- Clear the drain. Standing water from a blocked filter or drain pump W10876537 stops a new cycle from arming; clean the dual filter and the sump.
Repair or Replace?#
A latch, inlet valve, or filter clean-out is a low-cost repair, and the control board is the only pricey part on the list. A quick diagnosis tells you which and gives you an upfront number to weigh against the dishwasher's age. Book a technician if the code points at the board or you would rather not pull the door panel.
The Real Cost of DIY
Average DIY attempt: $150-400 in tools you may use once, plus the risk of further damage. Our diagnostic visit costs $0 — we find the problem and give you an honest quote.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Frequently Asked Questions#
My Whirlpool dishwasher has lights but will not start the cycle — why?#
Lights mean the board has power, so the block is usually downstream: a door latch that is not confirming closed, or a control that is waiting on a water or drain condition. Reseat the door, then check the latch switch and any F#E# code.
What does it mean if there is water in the bottom and it will not start?#
The control will not arm a new cycle while the tub still holds water. Clean the filter and clear the drain pump so the machine drains fully, and the start problem usually clears with it.
Can a blown fuse or breaker cause this?#
Yes. Before opening anything, confirm the outlet is live and the breaker has not tripped — a dishwasher shares circuits with disposals and outlets that can knock the breaker out.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
