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Old 06-19-2014, 09:17 AM   #1
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Roof top air ?

Why does my roof top air work only on high speed or max ? on low or med it will not put out cold air ??
Thanks
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Old 06-19-2014, 07:59 PM   #2
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first of....does it put out any air on low or medium?

Fan working on "high only" sounds like a switch or a fan resistor...depending on model schematics

only cold on high sounds like a trip to your favorite service provider is in order.

with the limited info provided...thats all i got!
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Old 06-19-2014, 08:29 PM   #3
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It's possible your thermostat is not working correctly.
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Old 06-19-2014, 09:08 PM   #4
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Have you taken the cover off and cleaned the coils? Also how about the filter on the intake grill? I'd start there. While the cover is off you can have someone run it on different settings and see if the compressor is working on all fan speeds.
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