Seems residential home pre-sale inspections cannot be run for the A/C side if the outside air temp is below 60F

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It can. However, what is needed is the higher pressure. The two are related, as the pressure temperature charts show. But, the pressure is the variable that's needed.
Christopher A. Young Learn more about Jesus www.lds.org .
The Daring Dufas wrote:

Why couldn't a thermostat that can sense condenser coil temperature be used to turn on the fan when the coils reach some pre-determined temperature?
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On 1/20/2013 11:20 AM, The Daring Dufas wrote:

Along the same lines, but even more extreme, I have seen systems here (Minneapolis) for commercial kitchen refrigeration where the compressor is in the basement, condenser on the roof, and where there is an automatic valve to bypass the rooftop condenser when the head pressure is too low.
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