My nouns condition keep popping and cracking.why? when left running for a while our air part starts popping and...

when left running for a while our air part starts popping and cracking and quits cooling what causes this?
Answers:    I am having duplicate problem right now on my 8 year old 10 seer 3 1/2 ton section. My ac was popping and I found out it was the wires to the compressor. The tech told me that a surge or something melt the plug. The AC unit would trip the breaker due to he had straps keeping surrounded by on and not pooping off but that didnt work for long. I am right now have him put on a new plug wire due to the melt rubber has opened the electric from touching respectively other and making it pop and all. I hope it was the problem. Mine is a adjectives in one unit and I hold a manufactured home.
try to be a little bit more definitive with your request for information. Is it a window unit? Is it a central whole house unit? What is the model number? When it pops and cracks, where on earth does it happen? It could be several things. You should call a repair man!