Those basement units are notorius for going bad. Start by opening up the access panel, the screen type door in front of the units, and checking the wiring behind the electical access panel. With both panels open have someone turn on the ac and listen for any noises. DO NOT stick your fingers in the elaectrical connection panel. There are capacitors in that panel that control the start and run of the motors. There are two ac units in there, one runs until the thermostat calls for more cooling then the second one runs. It could be enything from bad start capacitors to stuck compressors. Capacitors are easily replaceable but replacing compressors is a bigger problem. Thosa Coleman units are obsolete but there are other replacement units available. They are built the same as home ac units so residential hvac people can work on them IF you cab find one that is willing to do so. Most will say "I don't work on RV units". Good luck.
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2000 Winnebago Adventurer 32v, P32 Workhorse Chassis with 01/2000 build date with factory wide track front end, 7.4l Vortech, J71 Ultra RV upgraded 67,000 miles
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