Quick Answer
Before calling a technician, check these six things: the power connection, the door latch, the circuit breaker, the water supply valve, the filter for blockages, and any error codes — these account for most dishwashers that suddenly stop working.
A dishwasher won't run at all if the door isn't fully latched — this is one of the most common and easily missed causes.
A dishwasher that's stopped working completely doesn't always mean a major fault. Several common causes are simple to check and don't require any tools — and if none of them resolve it, our dishwasher repair technicians can usually diagnose and fix the rest in one visit.
Work through these six checks in order before assuming you need a repair booking.
6 Checks Before Calling a Technician
- Confirm the dishwasher is receiving power and the outlet works
- Check the door is fully closed and the latch is engaging
- Check the household circuit breaker hasn't tripped
- Confirm the water supply valve behind the dishwasher is open
- Clean the filter at the base of the tub for blockages
- Note any error code shown on the display panel
Why the Door Latch Matters
Almost all dishwashers have a safety interlock that prevents the cycle from starting unless the door is fully closed and the latch engaged. If the dishwasher seems completely dead, this is one of the first things to check — and it's a free fix if the latch mechanism just needs realigning.
What the Error Code Is Actually Telling You
Manufacturers each use their own numbering, but dishwasher error codes generally fall into a few categories regardless of brand: a fill fault (water isn't reaching the tub — check the supply valve first), a drain fault (water isn't leaving — check the filter and drain hose for a kink), a door/latch fault (the safety interlock isn't detecting a closed door), or a heating fault (the water isn't reaching temperature). Noting the exact code before calling a technician — and which of these four categories it falls into — speeds up diagnosis considerably, since it usually narrows the fault down before the technician even arrives.
When the Fault Is More Serious
If you've worked through all six checks and the dishwasher still won't run, the fault is likely the control board, door latch mechanism itself, or an internal electrical component — all of which require a licensed technician to diagnose and repair.
What's Safe to Check Yourself vs When to Call a Pro
Safe to Check Yourself
- Confirm the dishwasher is receiving power and the outlet works
- Check the door is fully closed and the latch is engaging, with nothing (a utensil, packaging) caught in the seal
- Check the household circuit breaker hasn't tripped
- Confirm the water supply valve behind the dishwasher is fully open
- Clean the filter at the base of the tub for blockages
- Note the exact error code shown, if any, before calling a technician
Always Call a Licensed Technician
- Diagnosing and replacing a faulty control board
- Repairing or replacing the door latch mechanism itself
- Diagnosing an internal electrical or wiring fault
- Replacing a failed water inlet valve or drain pump
Frequently Asked Questions
Why has my dishwasher suddenly stopped working?▼
Check power, the door latch, the circuit breaker, the water supply valve, and the filter first — these cover the most common causes.
Will a dishwasher run if the door isn't fully closed?▼
No — a safety interlock prevents it from starting. Make sure the door is closing fully and the latch is engaging properly.
What does it mean if my dishwasher shows an error code?▼
Error codes indicate a specific fault detected internally — generally a fill, drain, door/latch, or heating problem. Note the code before calling a technician, as it speeds up diagnosis.
Is a blocked filter a common cause of a dishwasher not working?▼
A blocked filter more commonly causes poor cleaning or drainage issues rather than the dishwasher not starting at all, but it's worth checking regardless.
How much does it cost to fix a dishwasher that's stopped working?▼
It depends on the cause — a door latch adjustment is often a low-cost fix, while a control board or water inlet valve replacement typically falls between $150 and $350. DP Electric provides a free, fixed quote before any work begins.
Should I keep trying to restart the dishwasher if it won't run?▼
A couple of restart attempts after checking the six items above is fine, but repeatedly restarting a dishwasher that consistently fails at the same point doesn't fix anything and can occasionally worsen an electrical fault — if it's still not running after those checks, it's time to book a technician rather than keep retrying.
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Dishank Patel
Lead Technician & Founder · DP Electric Melbourne
Dishank Patel has over 10 years of hands-on experience repairing household appliances across Melbourne's eastern suburbs. He holds all required Victorian electrical and gas licensing and has personally repaired thousands of appliances across brands including Bosch, Miele, LG, Samsung, and Fisher & Paykel.