Have three large fans and 3 remotes; all remotes turn lights on/off and dim them; only one remote turns on one of the fans but not the other two. Wall switch is main on/off for all three fans. Have put in new batteries for all remotes. Just bought house; don't have manual. What components might be malfunctioning?:(
Dean

Here is my read on your issue. You have 3 good receivers because all fans can be turned on by some remote. Do you mean each remote can turn on all 3 fans or can they just turn on their own single fan? I'd inspect all sets of dip switches in all 3 receivers and remote to make sure what you have. One remote should match only one fans receiver, each fan can then have its own dedicated remote so they don't all come on and off at once. Come back and tell me what you found with your 3 sets of dip switches.

Do fans have a pull chain?

I don't see it as 3 confirmed good receivers. Take the one remote that works and match the dip switches to the two other fans, one at a time, to see if that remote controls the other two fans.

Ceiling fan remote controls - help and FAQ- Ceiling Fans N More