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Do you check return static prior to or after filter?
E1 code only means you have a communication problem?
When using a smart device to change settings on a NFC board, power must be on when connecting the smart device?
When you get a new control board that has a model plug on it, the new board comes with a new model plug?
On a blower motor in a furnace, what wire is the communication from the board to the blower motor?
When setting dip switches on a MURA/MUAA system, scenario 1, what dip switch do you turn on on the outdoor unit?
When checking supply static on a furnace, you check where?
When checking power on communication of a furnace and heatpump, you should have what for DC volts on A&B?
Max Ohm value on a ductless compressor is?
A reactor in ductless is good if it reads which of the follwing?