Question about Ruud UAMB Air Conditioner

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We have a Roof Mounted RUDD Unit. Yesteday when I went to check the thermostat to see why the house was so cold I heard it making a humming sound. I turned the thermostate to 60 degrees then it stopped making a noise ahen back up to 66 degrees and it started making the same noise again. The heat did not kick in at all. I have the fan set to auto also.

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Good cks skeeter advised , if these ck out possible fan motor or capacitor

Posted on Dec 29, 2008

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You need to check if you have full 220 voltage to unit sounds like one leg of your power is out. You have slow blow fuses on this so turn off the breaker that goes to unit and then pull fuses out and check each one. You can check at the place where the main power comes into unit if you don't mind checking electricity but take your volt ohm meter and check the two power leads on the contactor that is the first thing that the power is connected to. Let me know if that checks out Okay. ken

Posted on Dec 28, 2008

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