Bush F721QW lights flicker then nothing

Hi, and welcome. From your description, this sounds less like the door lock and more like a power supply/control issue. On these machines, flickering panel lights followed by a dead display often points to the main control board not getting a stable low-voltage supply, but it’s worth ruling out the simple things first.

Before checking anything internal, isolate the washing machine from the mains.

1. Check the incoming power - Try a different appliance in the same socket. - Inspect the plug and fuse (normally 13A in the UK plug top). - Look for any signs of overheating on the plug, socket or mains lead.

2. Check for a poor connection - If you’re confident removing the lid, inspect the mains filter, wiring plugs and harness connections to the control board. - Look for loose connectors, burning, corrosion or damaged wires, especially where the cable flexes.

3. Inspect the main PCB/control module - Flickering lights then nothing is commonly caused by a failing PCB power supply section. - Look for obvious damage such as burnt components, bulging capacitors or scorching on the board. - If the board has no visible damage, it can still be faulty.

4. Don’t assume the new door interlock is good - If it’s not the exact correct replacement, or there is a wiring issue to it, the machine may still not power up properly. - Check the connector and wiring back to the module.

5. Consider whether it failed suddenly or after a trip/surge - If it happened after a power cut or tripping, that makes module failure even more likely.

If the supply into the machine is good, and connections are sound, the main control board is the prime suspect. Any live electrical testing should be left to a qualified appliance engineer.

WhitegoodsHelp AI