Split the problem in two before you do anything else: is the machine completely dead, or does it have lights but refuse to begin? A dead machine is a power problem — socket, plug, breaker or RCD. A machine with lights that will not start is nearly always the door interlock, a child lock, a delay timer, or a water supply it cannot find.
Dead, or lit but not starting?
These are two different faults and they are worth separating before you spend any time on either.
- Completely dead — no display, no lights, no click when you press the button. The machine is not receiving power, or is not switching it through.
- Lit but inert — the display works and buttons respond, but pressing start achieves nothing, or the cycle begins and immediately pauses. The machine has power and is refusing to proceed for a reason.
If the machine is completely dead
Switch off at the wall and unplug before examining the plug, cable or socket. If you find scorching, melted plastic or a burning smell at any of them, do not plug it back in — that needs an electrician.
- Test the socket with something else
Plug in a lamp or a phone charger. If that is dead too, the problem is the socket or the circuit, not the washing machine.
- Check the breaker and RCD
Look at the consumer unit. A breaker can trip only partly and still look on — switch it fully off and back on. An RCD that trips the moment the machine is plugged in points to a genuine electrical fault in the appliance, and that needs professional attention rather than repeated resets.
- Inspect the cable and plug
Look along the whole cable for crushing or damage, especially where it passes behind the machine. Machines pushed hard against a wall can trap and eventually cut through their own cable.
- Avoid extension leads
Washing machines draw heavily, particularly while heating. Run the machine from a wall socket directly. A marginal extension lead can drop enough voltage to stop a machine starting reliably.
If the socket is live, the cable is sound and the machine is still completely dead, the fault is inside — the mains filter, the on/off switch or the control board. That is where DIY reasonably stops.
If it lights up but will not begin
- Close the door properly
Open it and shut it again firmly until you hear the interlock click. Run a finger round the seal for a trapped sock or a corner of fabric holding it fractionally open — a door that looks closed but has not latched will stop everything.
- Check for a child lock
Almost every machine has one, and it is easy to enable by accident. Look for a padlock or key symbol on the display. It is usually cleared by holding two specific buttons for a few seconds — the combination is printed on the control panel or in the manual.
- Check for a delay start
If the display shows a time counting down rather than a cycle running, a delayed start is set. Cancel it and start the programme directly.
- Open the water taps
Many machines lock the door and then sit waiting for water. From the outside this looks like a machine that will not start. Open both taps fully and straighten the inlet hoses.
- Press and hold start
Some models need the start button held for two or three seconds rather than tapped. Worth a try before assuming anything is broken.
- Reset the machine
Unplug for a full minute, then plug back in and select a short cycle. Control boards latch faults and occasionally hold them after the cause has cleared.
- Let it cool if it stopped mid-cycle
If the machine ran and then stopped and now will not restart, the motor’s thermal overload may have tripped. Leave it for an hour and try again. If it repeats, the motor is working too hard — often because of an overloaded drum or a seized bearing.
A machine refusing to start often shows a code explaining why. Water supply codes (Samsung 4C/4E, LG IE) and door codes (Samsung DC, LG dE) are the two you will meet most. Codes vary between model generations, so check the documentation for your exact model rather than assuming.
Common causes
| Cause | How likely | Which symptom |
|---|---|---|
| Tripped breaker or RCD | Very common | Completely dead |
| Door not fully latched | Very common | Lit but will not begin |
| Child lock enabled | Common | Buttons unresponsive, padlock symbol |
| Delay start set | Common | Countdown on the display |
| Water taps closed | Common | Starts, locks, then waits |
| Failed door interlock | Common | Lit, door shuts, cycle never begins |
| Motor thermal overload tripped | Occasional | Stopped mid-cycle, will not restart until cool |
| Faulty on/off switch or mains filter | Occasional | Completely dead, socket confirmed live |
| Control board failure | Uncommon | Everything else checks out |
When to call a professional
Call an electrician if the machine trips the breaker or RCD every time, or if you find scorching or a burning smell at the plug, socket or cable. Call an appliance engineer if the socket is confirmed live, the door latches correctly and the taps are open, but the machine is still dead or inert — at that point the fault is the interlock, the mains filter or the control board, all of which sit next to live components inside the cabinet.
Stop and call a qualified appliance technician or electrician if you find scorched or melted wiring, smell burning, see water that has reached electrical components, or if the fault returns immediately after a repair. Never bypass a safety device — thermal fuses, door interlocks and flood switches fail for a reason, and defeating one converts a broken appliance into a fire or flood risk.
