The short answer
A Costway dishwasher that will not start is far more often refusing than broken, because it checks its door, its panel and its supply before anything happens. On this class the usual cause is a tap connection not made or not opened, with no power reaching the machine next to rule out, and neither needs a tool.
What you actually observe
- It powers up and then sits there doing nothing — A machine waiting for water looks like one that will not start.
- It seems to do nothing for a very long time — Quiet modern cycles look stalled for hours at a time.
- NEAR MISS: it runs a full cycle and the dishes are dirty — That is a cleaning problem, with its own cause list.
The causes, most likely first on this brand
- A tap connection not made or not opened — A portable machine draws through an adaptor on the kitchen tap, and a machine connected but with the tap closed waits exactly as a plumbed one would. Ranked first on a Costway unit: a connection made afresh for every cycle is the thing most likely to be wrong right now, and this class cannot start without it.
- No power reaching the machine — A dishwasher is usually wired to a switched spur or a socket inside a cabinet, and a switch knocked off or a breaker tripped presents as a completely dead panel. Ranked second here: these are plugged and unplugged constantly and the lead takes the wear.
- A door latch that is not registering as closed — Ranked third here: a light door on a machine that gets moved rarely closes squarely.
- A delay start left set from a previous cycle — Ranked fourth here: last, though a small panel makes a delay easy to set unnoticed.
Check in this order, and why this order
- Check the adaptor is seated and the tap is fully open and set to hot — This class depends entirely on a connection made afresh for every cycle.
- Find the switch or socket that feeds the machine and check the breaker — The spur switch is frequently inside the cabinet beside the machine and easily knocked.
- Open the door fully and close it firmly, listening for the latch to click — A latch you can hear has engaged, and a silent close is the fault.
What an owner can safely check
- Seat the adaptor squarely, open the tap fully and start the cycle again — Hold the adaptor while the first fill starts to be sure it is sealing.
About 10 min
- Switch the spur or socket back on and reset the breaker once — If the breaker trips again straight away, stop and call rather than resetting it repeatedly.
Tools: torchAbout 15 min
- STOP HERE if the next step needs a meter on live terminals or a panel off — That is where an owner check ends and a service call begins.
Before you open anything
Safety
Switch the machine off at its breaker before reaching into the door trim or under the sink, because the heating element in the floor of the tub stays hot after a cycle. Never defeat a door latch to make a machine run. If the breaker trips a second time on this appliance, leave it off and call rather than resetting it again.
When to call a technician
Call once the door, the panel, the supply and the water are all clean and the machine is still dead, because a latch assembly, a fuse or a control board means the door trim off and a meter. Call immediately rather than resetting again if the breaker trips a second time. Bear in mind when you decide that parts for a value import are not stocked locally and a replacement unit can cost less than a part plus a labour call.
Nearest pages of this class
What this page does not cover
This page covers the Costway dishwasher as a class, not one family or model line. Panel legends, lock combinations and latch assemblies all change from build to build and are deliberately not here. Where a family or model page exists for your machine, it is the more specific answer and the one to read first.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
