Our ceiling fan is exhibiting an odd behaviour: it starts up nice and fast with a pleasant breeze, but after ~10-20 minutes abruptly slows to a total crawl (around 20 RPM or so). After a minute or two of this, it speeds back up again, then slows down again a minute later, etc. The slow periods get longer and longer until it just stays slow.
The fan is a "Model D5201", no manufacturer on the label (there's an Intertek number on it). It came with a remote control with three fan speeds; using the different fan speeds would cause the fan to spin at an appropriate speed for a bit before slowing down.
I removed the remote control receiver unit, but it still behaves the same way. Right now I have it wired directly to the wall switch without the receiver.
My first thought, as with Ceiling Fan Not Spinning Normally, Replaced Capacitor Already, was to replace the capacitor, so I ordered a brand-new 3.5uF capacitor off Amazon and swapped it in. No dice - still slows down. I've checked the blade balance (seems fine), fan rotation (spins freely and smoothly), and the built-in halogen light works fine.
What might be the problem with this fan?
