Lights Flickering When fan turned on and off

[augustesben]

In my room 2 and room 3 when I switch on and off the ceiling fan the led lights flicker? Why does this happen? Can I get some advice please.

 

[popatim]

When electric motors start up they consume much more power then they use when running. This tends to draw down the voltage on the line just as when light bulbs dim when they fridge starts up. Sounds like your pc is on the same line as the light. You might think about trying another outlet or having an electrician add a dedicated line.

 

[Karadjgne]

9 times out of 10, it's the wall outlets themselves that is the issue. General construction habits are to save money by saving time, so commonly outlets are 'stabbed' not 'wrapped' by the wires. Over time, the tiny spring brass in the outlet gets soft, looses a lot of its contact with the wire and this'll affect available amperage in the outlet as resistance is built up. Over long periods, this'll heat up the outlet, making it worse, until it melts or a fire is started. No joke. It's real.
There's only one cure for this, have someone knowledgeable pull out all of the outlets on that circuit and wrap the wires around the screws instead if having them stabbed in the back. If any look suspicious, replace the outlet. Make sure all connections are good, that includes a trip to the panel (breaker box) and making sure all wire terminations, especially the neutral bar, are good and tight (not over-tight).
Your room 2 and 3 are on the same circuit. Same breaker. The wiring will be daisy chained from one to the other, so the home run is usually the light switch closest to the breaker. From there it'll go around all the plugs in a line, then jump to the other room, or if the switches are on the same wall, it'll run light to light and split to the plugs. Either way, there is at least 1 bad connection between the first switch, and the pc outlet, so to test, you'd need to run an extension cord to the bathroom, which is guaranteed a different circuit in any home after 1970 or so.

 

[augustesben]

When electric motors start up they consume much more power then they use when running. This tends to draw down the voltage on the line just as when light bulbs dim when they fridge starts up. Sounds like your pc is on the same line as the light. You might think about trying another outlet or having an electrician add a dedicated line.

 

[augustesben]

Thanks for your feedback and recommendations. Greatly appreciated. Best Regards