Is the receiver for my ceiling fan defective or do I need to modify my wall switch?
If your wall switch is a simple mechanical switch I don't see how it could possibly have anything to do with the problem.

You can easily rig up a test apparatus to determine if the receiver/transmitter is working properly. (This worked for my Hunter fan with light fixture, but of course I can't say whether a pure resistive load would test the receiver for a Minka Wave fan.

In summary, cut the cord of a working lamp with say a 40-W incandescent bulb and insert the receiver into the cut as if it were the fan. I used this to determine that my receiver was working and the failure must have been due to a poor connection. I had noticed on removing the receiver that at least one of the stranded wires was poorly stripped (most of the strands cut away). I have now replaced the receiver, re-stripped and tinned the wires (on the receiver not on the fan, those were OK) and the fan/light are now working.

See Why doesn&#39;t my ceiling fan&#39;s light kit work?