LG dishwasher won’t power on and there’s no error code
Appliance ExpertHi, I’m Mike, your home appliance troubleshooting expert—can you share the exact model number, and when you press the Power button do you get any lights or sounds at all?
I don’t have the model to hand, it’s an LG built-in about 4 years old, and there are no lights or beeps when I press anything—kind of totally dead.
Appliance ExpertCan you confirm the outlet or spur feeding the dishwasher has power and that no breaker or RCD/GFCI has tripped?
Yeah, other sockets are fine, the little switch by the counter is on, and the breaker/RCD haven’t tripped.
Appliance ExpertWhen you close the door, does the latch engage with a firm click, and has the door or hinges ever been damaged or misaligned?
The door clicks shut normally, hinges seem fine; we did have a small leak under the sink a couple weeks ago and the base area got a bit damp.
Appliance ExpertBefore it went completely dead, did you notice any flickering display, intermittent power, or a pop/burning smell from the control panel or kickplate area?
No burning smell, but the panel did freeze once, and we had a brief power cut last week; I’m kind of anxious about it now.
Appliance ExpertThanks—that helps narrow it down; based on no lights at all, good supply at the wall, a solid door latch, recent dampness, and a recent power cut, the most likely causes are:
- A blown fuse in the switched fused spur or plug (EU setups often use a fused connection unit); the switch can still show “on” even if the internal fuse is blown.
- A loose or heat-damaged power connection at the dishwasher’s internal terminal block/junction box, sometimes worsened by moisture.
- A failed line/noise filter (mains filter module) that sits just inside the base—these can open up after a surge and leave the unit completely dead.
- Moisture intrusion into the base pan triggering the anti-flood float or corroding wiring/connectors; some LGs will show an error, but heavy moisture can also take out the UI or power path.
- A failed UI/control panel or main control board, often after a brownout/surge; total no-power is more commonly the filter or board than the door switch in your scenario.
Safety notes:
- Mains voltage inside can cause shock—don’t open panels unless you’re confident and the circuit is isolated.
- If you smell burning, see scorch marks, or a breaker trips repeatedly, stop and have a licensed technician or electrician inspect it.
If you want, I can guide you through a few safe, basic checks to confirm whether it’s the fused spur, terminal connection, or the filter/board; sharing the exact model number would also let me be more specific.