Smeg dishwasher won't start

If a Smeg dishwasher is completely dead with no lights at all, start with the simple power-supply checks before suspecting the dishwasher itself.

1. Check the mains supply Make sure the plug is firmly in the socket and the socket is actually live. Try a lamp or kettle in the same socket. If it’s hard-wired, check whether there is a fused spur switch nearby and make sure it hasn’t been switched off.

2. Check the fuse If it has a 13A plug, inspect the plug fuse and replace it with the correct rating if blown. If it’s on a switched fused spur, that fuse can fail too.

3. Check for a tripped breaker Look at your consumer unit/fuse board for a tripped MCB or RCD. If it trips again when you restore power, stop there as that points to an electrical fault.

4. Check the door is closing properly A dishwasher can appear dead if the door latch or door switch isn’t being made properly. Make sure the door closes fully and the latch engages cleanly.

5. Look for signs of power at the control panel If there are still no lights at all after confirming power to the appliance, likely suspects are the on/off switch, wiring connections, mains filter, door switch, or the main control module.

6. Internal checks Isolate the appliance from the mains before removing any panels. Check for burnt connections, loose wiring, or obvious damage around the mains input area.

If the supply is definitely present and it remains completely dead, it will usually need proper electrical testing by a qualified appliance engineer. Any mains-related checks beyond basic fuse/socket checks are best left to a professional.

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