Bush F721QW lights flicker then nothing
Hi,
I'm a newbie here so please be gentle.
I've got a Bush F721QW and its developed the following fault. When I switch it on some of the lights on the control panel flicker on then I get nothing at all. When I rotate the programme button occasionally a light flashes on but immediately goes off. Its hooked up to water and electricity correctly and ive even changed the door interlock but there is no difference.
Any pointers would be greatly appreciated.
Solution Summary
AI-generated from this discussion
This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.
Bush F721QW flickering panel lights then dead
- The problem
- Bush F721QW washing machine shows some control panel lights flickering briefly when switched on, then goes completely dead. Rotating the programme selector may occasionally make a light flash momentarily before it goes off again. The owner stated water and power supply were connected and had already replaced the door interlock with no change.
- Likely cause
- Most strongly supported diagnosis is an unstable power supply to the control system or a fault on the main PCB/control module. A poor connection in the mains supply path, mains filter, wiring plugs or harness to the control board was also suggested. The replaced door interlock was considered less likely, though incorrect replacement or wiring to it was not ruled out.
- What fixed it
- Recommended action was to isolate the machine from the mains, then check the socket, plug fuse, mains lead, mains filter, wiring connections and harness to the control board for loose, burnt or damaged connections. If the incoming supply and connections are sound, the main control board was identified as the prime suspect. Exact repair was not confirmed in the discussion.
- Checks to try
- Tried or advised checking the wall socket with another appliance
- Advised checking the plug and 13A fuse
- Advised inspecting plug, socket and mains lead for overheating
- Advised inspecting mains filter, wiring plugs and harness connections to the control board
- Advised inspecting the main PCB/control module for burnt components, bulging capacitors or scorching
- Door interlock had already been changed with no improvement
- Parts or tools mentioned
- Door interlock
- Plug fuse
- Mains filter
- Main PCB/control module
Safety: Isolate the washing machine from the mains before internal checks. Further diagnosis should be carried out by a suitably qualified appliance engineer.
1 Answer
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.
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This answer was generated automatically by the WhitegoodsHelp AI Assistant. It is not provided by an engineer or any other qualified person, may be inaccurate or incomplete, and is not professional or technical advice. Do not rely on it. Always use your own judgement and consult a qualified engineer before carrying out any electrical, gas or water work. Use is entirely at your own risk. See our full Terms of Use.
SAFETY FIRST: READ BEFORE ACTING ON THIS GUIDANCE
Never work on a live appliance
Always unplug it at the mains before going near it with any tools.
Never attempt gas work
By law, gas appliances must only be worked on by a Gas Safe registered engineer. If your fault involves gas, stop and call a professional. Do not attempt it yourself.
Watch for sharp edges
Outer panels are smooth, but internal parts have sharp machined edges. Wear protective gloves and arm sleeves.
Water appliances can leak
Turn off the water supply before disconnecting any hoses.
Know your limits
If you are not confident testing or working inside the appliance, stop and call a professional.
AI guidance, not guaranteed
This response is generated automatically by the WhitegoodsHelp AI Assistant. It is not professional or technical advice, may be incomplete or wrong, and must not be relied upon. Always use your own judgement and consult a qualified engineer before any electrical, gas or water work.
This is general information only and is not professional advice. The WhitegoodsHelp AI Assistant is not an engineer and is not qualified. See our full Terms of Use.
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