I recently posted a possible solution to your problem in another similar thread (I put more detail in that post)...it sounds like the starter relay on the compressor has gone bad (if you take it off and you shake and hear pieces, that is your sign it is bad) - replace with Whirlpool kit 4387535.
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sounds like compressor relay --- if the fan and compressor come on and then shut off after about 5-10 seconds -- its the relay --- sometimes you have to also replace the transformer and capacitor on the opposite side of the unit --- all items are accesible from the back of the unit
For the soda name tags, I pulled logos off the internet and printed them the correct size on 20-pound paper. Different paper gives different translucence, so you might have to experiment to get the right amount of light coming through. PS: thanks for the part no. on the relay
I just replaced my in-pieces starter relay and thermal swich with a Whirlpool 4387535 kit. My Skybox has been working fine ever since.
Note I had the same symptoms as other posts of the compressor turning on/off continuously (but no cooling)...I believe what was happening is that the starter relay would allow current to flow to initially start the compressor, but would never stop providing current to it after it had already started (as it should) thus in a few seconds the thermal switch would sense this and trip / remove power to the compressor...then this cycle would start all over once the thermal switch cooled down again and let power back to the compressor...
This kit is evidently the newer style of what is on the original Skybox compressors (functionally speaking)...the new starter relay looks and installs like the old one, but the thermal switch is different and you need to remove the old one (follow the black wire on the top post of the compressor back a little to a small black round thing with a flexible metal piece inside). The good news is that once you remove it, it already has the correct spade lug on the wire to plug directly into the new thermal switch which sits right on the top lug of the compressor above the starter relay.
Note I'm not a service tech, just a Skybox owner who was/is tired of Maytag disowning this product and calling it a "throwaway" when any part of it stops working (and all local authorized service centers laughing when asked to repair one).
Continuing on with my rant a little, I also see other posts on the internet which also state "throwaway" when you actually have a bad compressor because you can't get direct replacements anymore - my friend who does AC work on the side said he most certainly could put another compressor in there from probably just about any other mini-fridge...he just noted that it is a small place to do it so the replacement compressor form factor will have to be considered. He stated you may get a little more or less cooling efficieny but who cares if you really want to keep your machine working that you can't buy anymore (nor get a close alternative).
Is it cooling at all? Do you hear the compressor start or just a buzz for a few seconds?
This sounds like a compressor or compressor start relay failure.
Unplug the machine.
Access the compressor and remove the relay that is plugged to the side of it. Shake it and see if it sounds like there are a lot of loose pieces in it. Inspect it for burned spots. If you find either one of these, it is bad. If it doesn't rattle or appear burned then the compressor is probably bad.
Even if it seems ok, I would try a new one on it anyway. They aren't usually very expensive.
If the relay is not the problem, check your owners manual for the warranty info. The compressor may still be covered by warranty even if the rest of the unit is out of warranty.