The short answer
On a Thor Kitchen dishwasher, a dishwasher that will not start is usually being stopped rather than broken: a door that is not quite latched, a control lock nobody set on purpose, or a dead outlet under the sink. All three are free to check and between them they account for most of these calls. Because the whole kitchen went in on one day, an installation fault shows up as an appliance fault here more often than on a machine replaced on its own.
What you are actually seeing
- It beeps and the lights flash when you press start — That is a refusal, not a failure — usually a lock or a door.
- The cycle light is on but you hear nothing — Many machines drain quietly before they fill. Wait before cancelling.
- NEAR MISS — it runs but the dishes come out dirty — That is a wash performance fault and it has its own page.
Causes, most likely first on this dishwasher
- The door is not latching, so the machine never sees it as closed — Ranked first on Thor Kitchen: a heavy pro-style door hangs on its hinges and its springs, and once the tension drops the door rests a fraction short of the latch. On this one, remember that the whole suite went in on one day, so treat the installation as part of the machine.
- A float or anti-flood device holding the cycle off — Second: a machine that has leaked once will refuse to start until the anti-flood device is reset, and nothing on the display explains that.
- Control lock, delay start or a demo mode is active — Third: a pro-style fascia hides its lock behind a long press on a button that does something else, so it gets set by accident and stays set.
- An electrical fault inside the machine — Last, and that is the point of the order: it needs the fascia or the lower panel off and a meter, which is exactly where an owner check ends.
Check in this order, and why
- First — push the door firmly shut and listen for the latch to click home — If it starts after a firm push, the latch or its alignment is the fault and nothing else on this list matters.
- Then — look at the float in the tub floor and lift it gently to see if it moves freely — A float that does not drop back is holding the machine off and it is an owner fix.
- Only then — only after door, lock, power, water and float are all clear — Everything above is free, and a control fault cannot be confirmed without instruments, which is why it comes after everything above it.
What an owner can safely check
- Close the door firmly and try again, then look at the latch plate — Push the door until the latch clicks rather than letting it swing shut. Check nothing on the top rack is holding it off the seal.
About 5 min
- Clear the control lock and any delay start — Press and hold the lock button for several seconds, then cancel any delay and start a short cycle.
About 5 min
- STOP before testing anything electrical with the power on — The checks above are all cold checks. Anything that needs power applied is where an owner check ends.
Before you open anything
Safety
Switch the machine off at its breaker before you reach behind it or take the lower panel off. The outlet under a sink is a wet location, so treat a tripped protective device as a message rather than a nuisance — a device that trips again after a reset is telling you something is wrong with the circuit or the machine. Do not defeat a door latch or hold a door switch closed to make a machine run: the switch stops the wash pump while the door is open.
When it stops being an owner job
Call once the door, the control lock, the outlet, the supply valve and the float have all been cleared and the machine still does nothing. At that point the fault is behind the fascia or in the base, and both need the power off and a meter.
Nearest pages of this class
What this page does not cover
This page is written for the Thor Kitchen dishwasher as a class, not for one family or one model line. Where a family-specific page exists for your unit it is linked above and it is the more specific answer. Deliberately not here: part numbers, wiring colours, torque figures and any measured value, all of which differ by family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
