The short answer
A Grandeur dishwasher that will not start is usually a door latch or a supply problem rather than a failed board. On this machine it is a house label, so the cabinet is one of a handful of factory platforms wearing a name rather than a design of its own, which is why the order below runs as it does. Whether the panel lights at all separates a supply fault from everything else, so establish that first.
What you observe
- The panel lights but nothing happens on start — Power is fine, so the machine is refusing. Usually the latch or the fill.
- The door will not latch, or springs back — The latch switch never makes and nothing will run until it does.
- Completely dead, no lights at all — A supply fault: the switched spur, the breaker, or the socket under the sink.
- NEAR MISS: it runs and stops partway through — That is a cycle fault and the drainage or cleaning pages are more likely to help.
Causes, most likely first on this build
- Door latch or its switch not making — Ranked first on this build: a heavy door on a precision catch goes out of adjustment here, and the latch switch is the safety interlock that stops everything.
- No power at the spur, socket or breaker — Second: the socket or spur is often behind a cupboard and gets knocked, which leaves a machine that looks dead and is not faulty.
- Delay start, child lock or a door opened mid-cycle — Third: a delay or a control lock makes a healthy machine look dead.
- Water supply valve closed or the inlet restricted — Last: worth checking, because the machine gives no clue that water is the reason.
Check in this order, and why
- Close the door firmly and listen for the latch — A crisp click means the switch made. A soft one or a door that springs back means it did not.
- Check the stop tap under the sink is fully open — The machine must satisfy a fill check before it will move.
- Clear any delay or child lock and power-cycle at the breaker — Last of the free checks, and it clears a control that has latched.
What an owner can safely check
- Find the spur or socket feeding the machine and confirm it is switched on and live — Test it with a lamp if it is a socket. A dead supply is an electrical fault, not an appliance one.
Tools: lamp or charger, torchAbout 15 min
- Open the stop tap fully and check the fill hose is not kinked behind the machine — Both are free, and both stop a cycle before it visibly starts.
Tools: torchAbout 15 min
- Clear any lock or delay, switch off at the breaker for a minute and retry — A full power-off clears a latched control where cancel does not.
About 10 min
- STOP HERE if the next step needs the door panel off or a meter on live terminals — That is where an owner check ends and a service call begins.
Before you open anything
Safety
Switch off at the breaker before removing any panel, because a capacitor can hold a charge after the power is off and the machine sits in a wet cupboard. Never defeat the door latch switch: it stops a hot wash spraying into the room. Close the stop tap before disturbing any fitting, and be ready for the water standing in the hose.
When to call a technician
Call once the spur is proven live, the door latches, the tap is open and no lock is set and it still will not start, because the next step is a meter on the latch switch and the board. Call at once if the spur or socket is scorched or smells hot, and leave the breaker off until it has been looked at. Parts are ordered against the model plate rather than the badge, and on a compact build the cost of a major part sits close enough to the cost of the machine that the quote decides the repair.
Nearest pages of this class
What this page does not cover
This page covers the Grandeur dishwasher as a class rather than one family or model line. Latch and panel part numbers, board variants, door fixings and the spur arrangements used on individual installations are deliberately not here. Where a family or model page exists for your unit, it is the more specific answer and the one to read first; the nearest pages of this class are linked just above.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
