Blower Fan Switch Wiring
Low fan speed power lead.
Blower fan switch wiring. Blower fan wire color codes. The common terminal on the switch goes to ground and that is shown as a black wire. Medium high fan speed power lead. Hope this helps a few folks out.
Get it as soon as thu jul 23. Medium fan speed power lead. In my diagram current starts at a 60 amp fuse which will be under the hood and it will feed other systems. On yours the 12 volt goes right to the fan motor and from there to all the resistors then one of them is grounded by the switch.
Typical fan wire colors in an air handler or at the blower motor will be not all of these are always present. This fan and limit control combines in one enclosure a fan switch with an adjustable differential which operates the blower in a forced warm air furnace and a limit switch with a fixed differential which automatically shuts off the burner if the furnace temperature exceeds a predetermined high point. Video demonstrating the standard wiring for the primary blower motor found in most furnaces and air handlers in residential hvac. High fan speed power lead.
Constant voltage for the blower motor is maintained via a capacitor supplying voltage across its secondary winding. The blower motor capacitor mounts to the outside of the blower s housing.