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Old 05-08-16, 07:30 PM   #10
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I believe the main, original intention of the manufacturer was to provide an inexpensive solution for window and mini-split owners whose units have suffered a control board failure, keypad failure, struck by lightning, etc. Original, factory control boards are very expensive to replace. Complete system replacement even more not cheap.

Xringer experienced one of these failures recently, and the cheapest, refurbished control board available for his unit is around 300 to 400 dollars (depending on the source). A whole new system is in 4 figure territory. This line of controls will not work with his system, because he has a variable-speed compressor. These controls will only work with single-speed compressors. I'm really glad he shared the link, as this type of control is perfect for the hacked heat pumps I tinker with.
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