Ever wondered what's inside the electronics panel of a big commercial HVAC unit? You've got the main control board, some adapter boards, and the power distribution block where the line voltage comes in. Those other big components? Those are contactors. They're "essentially switches" that are responsible for turning the heavy-duty compressors and condenser fans on and off. | SM Air / San Marcos Air Conditioning Inc. | Facebook
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22K views · 358 reactions | Had some help from my pal @the_hvac_foodie... I knew this board had a fuse many years ago but I had forgoten about it. Control board troubleshooting can be as simple as power in but no power out = defective board. #hvac #hvactroubleshooting #hvacdiagnostic #commercialhvac #hvactech #hvaclife #hvacaf #realhvacreallife #hvacsystem #hvacbusinsess #controlboardtroubleshooting #hvacr #makeupair | HVAC Know It All | Facebook
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