What is M1 and m2 on a furnace board?
M1 and 2 are park terminals. Thats where you put the unused speed wires.
What wire controls furnace fan?
The red or yellow wire operates the air conditioning. The green wire is the fan wire and allows for independent fan control. Your white wire is your heat.
What is EAC on furnace board?
EAC= Electronic Air Cleaner. HUM= Humidifier. If you want your humidifier to run with both the heat and cool cycles, then wire to EAC (not recommended).
Where does the C wire connect on furnace?
Installing the required c-wire is a common procedure for any qualified HVAC service technician. Usually the new wire will connect to the control board in the furnace unit in order to complete the circuit that provides 24-volt electricity to your new smart thermostat.
Are furnace control boards interchangeable?
Once you have identified a defective control board, you continue your control board replacement by finding the proper replacement. This can be achieved by finding the manufacturer’s part number or by using the furnace model and serial number. There are also universal controls that can be used for many furnaces.
What is M1 on control board?
One is for 24v power. One is to have the damper sit in open and close if not called. The other is to sit closed and open if called. Usually. M1= 24v M4= Damper open M6= Damper closed.
Where does the C-wire connect on furnace?
What is hum terminal on furnace?
The HUM terminal on most furnaces is a 120VAC terminal. If you want to use the HUM terminal to control the humidifier, you’re going to have to use a step down transformer, to drop that down to 24VAC. To measure the voltage on the HUM terminal: Set your volt meter to measure AC volts.
How do I hook up my Goodman furnace humidifier?
The connection can be made by either stripping the wire and using a wire nut or by using a field supplied quick connect terminal. The wiring must conform to all local and national codes. Connect the COM side of the humidifier to the C terminal on the furnace control board (or to the COM side of the 24 VAC transformer).