I'm back again... Honestly, I only started actively using the fans since I moved into the house mid-last year... Half a year later, one of the 54" fans started slowing down only speed 3 and 4 worked, now only speed 4 works. Then, slowly two more 54" fans also failed. Only one left standing because it is in the guest room and I hardly have any guests staying overnight.

40" one is still OK...

Now what should I do with it? I contacted the CS and the replacement unit and service charges are crazy. Any other options besides changing new fans? Totally regret buying Cosa fans and will not suggest anyone to buy them anymore.

Thanks for this! Was it difficult for you to replace? Also, how long was it since your replacement? Not sure if this replacement will eventually slow down after a few months.