I have a 1/2 hp Craftsman GDO. It intermittently works. When it does not work, to get the door to open or close, I need to push the remote button several times to open or close it all the way. At times it works great, other times it does not. What is the issue here?

Make sure the LED in the wall control is not blinking. If it is press and hold the lock button for 3 seconds.

Check the wall console. If it has a lock button and the LED is flashing, the GDO is locked. None of the remotes will work, only the wall button. If it is locked, press the lock button and hold for a couple seconds and release. The LED should stop flashing, and the remotes should start to work.
If the door will open but not close, and the lights flash 5 times, check the door sensors. Make sure the sensors are aligned with each other, and the LEDs are both on.

If you didn't install the door sensors you must. If you did, make sure they are pointed at one another and the small light on each one is lit and not flickering. Tweak them a little.

Random flashing of the learn light is normal. There is no simple fix for this as it sounds like the receiver portion of the logic board has failed.

There isn't a fuse. You are going to need to remove the cover on the opener and find out where you are losing the power. Maybe a neighbor has a volt meter you could use. I would check the power cord and then the logic board. Makes no sense but I would check for burnt or missing traces on the printed circuit board especially around that small transformer.

sounds like it blew the reciever crystal buy another and return the motor thats fried 4 refund

I think this is an easier way to program. Press and hold the button on the remote and then press and immediately release the smart/learn button on the rear of the motor unit. Do this for each remote you have.

The motor will need rewinding, and the condensor will probably need replacing.
That should do it:)

One of your remotes has reverted to an earlier technology and they will no longer work with each other. You need to purchase a new remote making sure you get the same model number. Then you will find you can program 2 that will work with each other and 1 that will not. Remove the battery from the bad remote and toss it so that it doesn't cause problems down the road.

I have no idea what a 132C2105-3B is but try this. Hold the button down on the remote and then press and immediately release the smart/learn button. If the remote is the correct one for your opener it should work.