We have two videos below. One video show the basics about compressors in air conditioning systems. The bottom video shows how an air conditioning system works. Many time compressors will not run because of a burn wire. Please click here if you would like to see the compressor terminal repair kits we sell. Sometimes compressor will not start because they are stuck or need a boost. Please click here if you are interested in seeing the compressor hard start boosters we sell. I like the $14.00, SPP6 hard start booster the best. Sometimes compressors and motors will not run because of a bad or weak capacitor. Please click here if you are interested in seeing the 80 or more capacitors we sell. If you would want to invest in a capacitor tester….Please click here if you would like to see the MFD10 capacitor tester we sell. Please email us anytime if you have a question. Our email address is: firstname.lastname@example.org We would love to help you out and have your business!