Hi,
I recently had 3 ceiling fans failing after 3 plus years of used - 2 48' in my bedrooms and a 54" in my living room.
All faulty fans Low and Mid fan speed very slow, but at High speed the fan was OK.
I managed to replace the fan's wireless remote modules capacitors to repair them:
1 48" fan white colour remote module - replaced the 2UF MKP-X2 capacitor with CBB61 type capacitor but need to cut some plastic and jumper wire, replaced the 1UF capacitor with 2x0.47UF capacitors twisted together. (Because i can't find the low height type capacitors used in the remote module)
I found that the white remote module come with a 2UF and 1UF (MKP X2 type, 275Vac) capacitors and the black remote module come with 3UF and 2UF capacitors. The first capacitor is use for both Low speed and Mid Speed whereas the second capacitor is use for Mid speed. So the first capacitor can affect Low and Mid speed of the ceiling fan.
For the other 2 fans I bought a $12 fan remote control kit and found that there were a 2UF and 3UF capacitors that can be used, just that they are slightly smaller in size then the capacitors to be replaced.
1 48" fan white colour remote module - replaced the 2UF capacitor but need to drill a hole to fit the smaller capacitor.
1 54" fan black colour remote module - replaced the 3UF capacitor but need to drill a hole to fit the smaller capacitor.
The 18mm height capacitors use in the remote module seems to be used as Cooker Capacitor but I haven't purchased any to try.
Sharing the story and hopefully it will help someone, just that you will need the skill to do so.