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check the and see if the condenser fan is running. you will find it if you take the top off also check and see if the condenser coil is clean. if it is dirty or the fan under the top is not running it will cause the compressor to short cycle on limits or overload.
Find the name on your a/c unit. Then look in the yellow pages under air conditioners. There will be a service company that deals in that brand. If it is less then a year old there should be no problem with them fixing it. It should still be under warrenty. You should not need a receipt. Before you do that make sure your breaker is not tripped. The company that installed tour unit should have record of the install. Good luck
Go up on roof and using a stick or similar, poke it through the air holes in side & try to turn the fan blade at rear of the air conditioner. Make sure it's off at the time. Try to get 2 or 3 complete revolutions of the fan blades, then try turning it on fan only first,and let it run on fan for a few minutes, then switch to cool. If worse comes to worse and you can't get blades to turn, remove cover on roof (watch for wasps & bees) and spin fan blades a few times by hand, step back & have someone try fan only. If that works, then try cool. Sometimes they get a dead spot from sitting, and that will get it going again, 90% of the time. Let me know how it goes.
My Unit is only about 5 years old; but it's working great now. I spoke to a man at an RV service department, he suggest replacing the thermostate and Jay box, which is the box inside my roof unit, accessable when I remove the filter. When I replaced the thermostate nothing changed, but the Jay box did the trick. The Jay Box came with a new thermostate anyway, and cost around $80. Good Luck
I have a dometic 13500 BTU Roof mount a/c. It is set up with the duo-therm analog thermostat. The system cools fine. The problem is that the a/c gets down to the right temp, then it turns off like it should but turns right back on within a few seconds. Any help would be greatly appreciated.