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Old 08-13-2015, 06:20 AM   #1
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AC doesn't shut off

Wondering if anyone knows something about this, but my 2013 Sabre TBOK AC unit will turn on and run fine, but it will not shut off. The past couple of nights I have run it my wife says it never shut off. I have had to get up to shut it down from the thermostat. I set it to 72 but it doesn't seem as cold either when it first runs. Any thoughts or suggestions appreciated.
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Old 08-13-2015, 06:34 AM   #2
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depending on the type of unit and type of thermostat, this may be normal. If you have a digital wall thermostat, set the fan to "auto". If your controls on on the unit itself, the fan will run all the time.
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Old 08-13-2015, 07:36 AM   #3
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Originally Posted by davel1971 View Post
depending on the type of unit and type of thermostat, this may be normal. If you have a digital wall thermostat, set the fan to "auto". If your controls on on the unit itself, the fan will run all the time.
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Old 08-13-2015, 08:17 AM   #4
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I've noticed the 13.5K Btu runs a lot longer in this TT over the previous. More sq footage I guess. I don't believe the standard T-stat is super accurate. Have yet to mount just a inexpensive thermometer near the T-stat to check calibration and derive realistic set point for the T-stat. But, I can raise the T-stat setting above where it was and the AC will shut down. The auto setting on the fan is a valid point.
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Old 08-13-2015, 04:23 PM   #5
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What is the outside temp? If it is too hot you never will get it down to 72.
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Old 08-13-2015, 07:22 PM   #6
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Does anyone know if there's a way to rewire the thermostat on the unit to have the fan turn off when the compressor shuts off? I know it's normal to have the fan running full time, but it's very distracting when the compressor is off. Our unit doesn't have a wall thermostat. Thanks
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Old 08-13-2015, 11:02 PM   #7
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Does anyone know if there's a way to rewire the thermostat on the unit to have the fan turn off when the compressor shuts off? I know it's normal to have the fan running full time, but it's very distracting when the compressor is off. Our unit doesn't have a wall thermostat. Thanks
It is easy to rewire any unit so that the fan and the compressor turn on and off together. The problem with this set-up is that the thermostat sensor element is designed to have airflow across it from a constatnt fan, and will not work as well with the fan off. You usually end up with temperature swings of 4 or 5 degrees.
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Old 08-13-2015, 11:08 PM   #8
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Mine doesn't turn off either but I have it set to 65 deg. and it's 100 here everyday. LOL
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Old 08-19-2015, 10:38 PM   #9
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I'd put money down that you have your thermostat set to "low" or "high" instead of "auto." The auto setting will run the fan at the appropriate speed but shut it off when the desired temperature is reached. The other two settings leave the fan on continuously.


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Old 08-19-2015, 11:05 PM   #10
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I'd put money down that you have your thermostat set to "low" or "high" instead of "auto." The auto setting will run the fan at the appropriate speed but shut it off when the desired temperature is reached. The other two settings leave the fan on continuously.


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