The thin, white cable leaving Fan Receiver is it's antenna. This is used to communicate with a remote. Poor placement of the antenna can cause issues with the control of the fan. Issues such as the fan not responding to a remote, failing to pair, missed commands, performing wrong functions, poor range, etc can all be symptoms of a poorly placed antenna.
The antenna can struggle to receive commands when it is being shield, especially by metal objects, or having interference transmitted by nearby cabling. The antenna should ideally have as much distance as possible from other objects as possible.
Below are 2 photos of poor antenna placement.
In both images the antenna is surrounded by earthed metal, wires and the receiver (a noise source itself). This can all lead to remote reception issues. Below is a photo of good antenna placement.
The antenna should be left to dangle down, away from the mounting bracket. The wiring to the fan motor should be kept away from the antenna. When the fan cowling is pulled up over the receiver, be use the antenna keeps clear of the wiring and rod as best as possible. Given the compactness of the fan cowling, without actively placing the antenna, it can often get into a poor position.
If the antenna has been placed well and there are still transmission issues, moving the antenna to face the remote (so that the fan rod isn't between the remote and antenna) can help.
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