A/C BFC 10 amp fuse constantly blowing

My air conditioning was not blowing very cold at all so, we attempted to fix it with a can of A/C PRO, but someone did that wrong and it did not make my A/C any colder. Then all of a sudden one day my air would not blow at all on any of the five speeds. My man replaced the blower motor and the blower motor resistor and we found out my air compressor needs replaced as well, but have not gotten that far yet however, we do have the it used in working condition from a junkyard waiting to be installed. Anyways, my car now decides it wants to crank and not start and we have tried almost everything to figure it out. We thought it was a bad fuel injector pressure regulator, but did not want to pay for a part of it was not necessarily bad. Anyways, we finally realize that the issue is the A/C BFC 10 amp fuse was blown and we did not have a 10 amp fuse at the time and so we used a 20 amp instead and she fired right up then days later she would not start again. Sometimes she would crank and sometimes there was nothing; no crank at all and no start. So, after this happening a few times we have pin pointed that the car is blowing that fuse and as long as we keep replacing it we can drive for up to a day before it blows again. But, this is becoming quite the issue and I do not need anything else to go wrong on top of it. So, we need to figure out why it keeps blowing and how to fix it. I got some sea foam and fuel injector cleaner or treatment and hoped that might help a little anyways. I do not know what to do because my car has been a very reliable car of four years now and I do not want to get rid of her anytime soon, but I really need a running vehicle.