Also check the discharge check valve. When the compressor stops, you get the quick vent of head pressure from under the pressure switch. This should only last for a few seconds, or thereabouts. It should eventually stop venting anyway. If the discharge check is even slightly leaking back tank pressure ( the dis. check isolates the head side from the usable side) you will get what you are experiencing. It might only be leaking occasionally, hence the good start then bad start scenario that you are having. What I do (I have had this happen on my home units) is vent the tank (important for obvious reasons) remove the check, stretch the spring slightly and dress the usually black teflon face with 600 wet and dry on a flat surface (mdf, glass, granite etc.) reassemble and run and unload a few times. It may take 3 or 4 goes before it seals. In my experience, if a cap goes, it is gone for good, same as a motor, unless you are having incoming power supply issues, hence my previous post regarding the "maybe" dodgy contacts in the pressure switch. It pays to check all of these things though as a matter of course, as sometimes you can over troubleshoot. In the video your compressor sounds healthy when on song, so this is probably something very simple. Don't worry about the cheap and throw it out views, I have some good stuff at home ( I am a compressor tech. by trade, or job description) and work for one of your mob, Sullair Australia, and I have a cheap direct drive such as yours and I have tried to kill it over the years and it will not die. 12 years old and have never changed the oil! Now , I did not say that out loud ok. cheers.
