My guess is that it really is low on charge. But to know for sure the testing method and results need to be posted. For instance, if using a DIY charging kit that has an indicator instead of a true gauge (and also lacking a gauge for the high side) you can be easily misled.
It is possible that some weird electrical problem exists that is perfectly rhythmically cycling the compressor, but not near as likely as the main cause - low charge.
How 'bout posting up more info? It might help.
If you're not qualified........DON'T MESS WITH IT!! It sounds like a low refrigerant problem however, you don't just add refrigerant for many reasons!
#1. AC is based on a refrigerant to pag oil ratio.......change it and your ac won't work properly!
#2. That stuff they sell at Wally World full of sealers, oils, and everything else will screw up your ac system and cost you more than you know!
#3. If it needs refrigerant.........you need to know WHY??? It more likely than not has a leak!
#4. AC systems need to be MOISTURE FREE!! If you don't know what you're doing you will introduce moisture into the system which in turn will combine with the refrigerant which will in turn rot out your entire system..........moisture and refrigerant combined are the biggest enemy of AC systems!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
#5. You may have a bad low pressure sensor and not need refrigerant.
This is just a few things, there's a whole lot more! AC system repair is generally not a "do it yourself" thing!!
Most who try end up spending far more than if they had just taken it to the experts to start with.
Find a REPUTABLE AC TECH........stay away from DEALERS because there's only one thing worst than a car dealer and that's a USED CAR DEALER!!
They stopped putting in Freon, which is R12 back in 1993. Today, we use a refrigerant called R134a. You need to hook up the proper R134a gauges and check the pressure. If it is low, it needs to be recharged. The correct procedure is to locate the leak, fix it, vacuum it down, then recharge it. If you don't repair the leak and decide to just fill it up with refrigerant, the R134a will just leak out again. You can buy the gauges at any auto parts store.
It is short cycling because it is low on refrigerant.
A/c doesn't barley get cold and it cycles on and off like it's low on freon but it's not nor is it over charged is the compressor going bad or relay or cluch
