North Alabama Pro Services LLC

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AL#14084 AL#52880

We service all makes of Walk-in Coolers and Freezers

Commercial Ice Machines.

High Quality Heating And Air Conditioning Repair


Seasonal Energy Efficiency Rating

We have years of experience to help you determine how to tackle all of your heating concerns.

Data based on a 3-ton system at $.11/kwh. May not be exact

This graph displays how important SEER ratings are when selecting a system for your home. We only install 14 SEER and higher rated systems

30 Years of experience in commercial and residential markets

This is what turns a regular air conditioner into a heat pump. The Reversing Valve directs refrigerant from the indoor coil to the outdoor coil and is capable of reversing the direction of flow making the cooling coil into a heating coil giving us the ability to heat our homes with the same machinery used to cool our homes.

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Ever curious about how a heat pump works?

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For more information about how your air conditioning system   works click here!

How does it work?

At first it looks fairly complicated but actually its not too bad once you know whats on the inside. The large brass cylinder in the center contains a U shaped shuttle that slides from one side to the other when the small electrically operated valve mounted in the center is powered. This small valve sends high pressure refrigerant from the tube at the top to one end of the brass cylinder which pushes the shuttle to the opposite end as the power is cycled off or on. The copper tube on the top and the center tube on the bottom do not switch. the tube on the top is always the high pressure refrigerant coming from the compressor and the center tube on the bottom is always the low pressure refrigerant going back to the compressor. The tubes to the left and right on the bottom reverse depending on the mode of operation. In the cooling mode the tube on the right is the low pressure side connected to the indoor coil. In the heating mode the tube on the right is the high pressure side connected to the indoor coil and the tube on the left is connected to the outdoor coil and is always the opposite pressure.

We have a number of different options to help you with all of your air-conditioning needs.