#defrost board

Tech Tips:

Heat Pump Defrost Boards and W2
By:Bryan Orr If you are used to simple, straight-cool split systems, you know that the low voltage to the outdoor unit is usually VERY simple. In many cases, there's just a Y (contactor power) and a C (common) connected to the outdoor unit. When the condensing unit controls are strictly two-wire low voltage, there is […]
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