I have a 1/2 HP Cratfmans GDO which I installed about six months ago. I want to program my Universal Clicker (http://www.aaaremotes.com/clicunem.html) to open it. Clicker says it will work with Craftsman GDO but I have a purple learn button my GDO opener andClicker only refences red, yellow ad green ones. I opened up my Craftsman remote but there are no dip switches that I can mimic. Can someone point me in the right direction to get a universal remote to work with my Craftsman GDO. Thanks

I've read my situation over and again, but have tried all suggestions. I've changed the worm gear and sprocket with no problems. Now the opener goes about 1 foot one way and reversed itself back to the start point. The assembly on the shaft is taught. The black plastic rotary wheel rotates with no problem thru the sensor. I guess my next step is to buy a new sensor. Just not sure how this would have gotten damaged. It wasn't touched while replacing the gears other than removing the wires plugged to it. If there's a reset button or any suggestions for a fix, I'd be greatly appreciative. Thanks,

I really like the simple way of programming remotes. Hold the button down on the remote and then press and immediately release the smart/learn button. Do this for each remote and see what happens. The constant blinking of the LED in the wall control tells you the lock function is on which locks out the remotes but the keypad should still work. Post back with results.

If this is anything like a very similar problem I just had with my garage door opener, it sounds like you have a bad receiver board. Problem is only likely to get worse. Need to replace receiver board or whole unit.