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Hunter Ceiling Fan Remote Control Issues

PROGRESS REPORT:

Resoldered the 4 yellow caps back onto the board and reassembled the fan unit. Tested by pressing the remote Hi button - blades began to turn - pressed the Reverse button - blades reversed and sped up to Hi speed. (That's the good news). Pressed the Lo button - blades continued turning at Hi speed - WTF! - Pressed the Medium button - fan shut off - WTF!!

PRELIMINARY DIAGNOSIS:

1) Pressing the Hi button turns fan on to Hi speed - so that works
2) Pressing the Reverse button does stop and reverse fan direction - so that works
3) Pressing the Medium button turns the fan off - so that doesn't work
4) Pressing the Lo button turns fan on to Hi speed - so that doesn't work

I'm considering desoldering and testing the four little black caps like @jaybirdss396 suggested.

There's a reason this fan don't work right, and I purpose to figure it out and fix it :mad:

In the meantime, I'm still open to expert analysis and insights ;)

Oh, I also used aluminum tape on the Reverse buttons of the other three fans, and now have three out of four fans working good as new :)
 
The 2 black boxy things as far as I can tell. They are a mechanical device and can get sticky over time...stuck on or off, or just wear out to point of being unreliable.

Dunno if there is a reliable way to test if they are just a bit sticky, besides listening for them to click on and off, which you can maybe trigger with a battery or batteries of enough voltage. A 12V relay should trigger off a 9V cell, but won't do anything to just 1.5V. Usually quite cheap and standard~ish so replacing shouldn't be much of a drama if they are bad.
 
While I was tinkering with the circuit board I found this on Ebay:

Hunter receiver.jpg

It wasn't the exact same model number, but worth trying it out for the price.
Arrived last Thursday and I got it installed that afternoon (plug and play at its best). So a happy ending for me, AND I've got a potential backup receiver if I can figure out what's wrong with it (no hurry now!)

Thanks to everyone who chipped in with knowledge and experience - always appreciated.
 
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