I have three of these shims all bought at different times over the last couple of years and connected to different Pis but all of them suffer from the same problem that has been reported by others on this forum.
Intermittent connectivity causes the fan to either run continuously at full speed or not run at all.
As the attached photo shows, the holes on the “solderless” connector are far too large to make reliable contact even if the header pins are forced apart as much as the base allows.
I could solder the shim in place but that would make replacement difficult and could cause spacing problems if I fit anything else onto the expansion header.
Given that this product has been out for a while now and frequently sells out completely I’m surprised that the problem persists.
Has anyone come up with a reliable workaround that leaves the expansion header usable and doesn’t involve permanently soldering the board into place?