wae
Well-known member
I've been trying to get my front rooftop A/C working for a while (well, more like thinking about it really hard and not really doing a whole lot...) and I've done all the "normal" stuff and tested a few things and can't seem to come up with a solution. In the process, though, I found a good deal on a used unit that had a compressor that worked, but the fan is locked up tight. I basically paid scrap value for it, so I figured it was worth a shot to repair it since, after all, I've got a fan that works on the A/C unit I already have!
In trying to swap the fans, however, I've run into a hiccup on the wiring. The working fan is a 5-wire fan and the seized one that I pulled out is a 4-wire fan. The old fan had red and black going to some wire nuts and then the white wire and a brown wire going to the capacitor. The newer fan shows a diagram of red going to low speed, black to high speed, white to line, and then brown/white and brown to what appear to be a capacitor on the diagram. The old unit with the 4-wire fan has its white wire connected to the capacitor that the white and brown are connected to. (see attached diagram)
My guess is that I want to directly connect the unit's white wire to the fan's white wire and then send the brown and brown-white to the capacitor. Am I on the right track?
In trying to swap the fans, however, I've run into a hiccup on the wiring. The working fan is a 5-wire fan and the seized one that I pulled out is a 4-wire fan. The old fan had red and black going to some wire nuts and then the white wire and a brown wire going to the capacitor. The newer fan shows a diagram of red going to low speed, black to high speed, white to line, and then brown/white and brown to what appear to be a capacitor on the diagram. The old unit with the 4-wire fan has its white wire connected to the capacitor that the white and brown are connected to. (see attached diagram)
My guess is that I want to directly connect the unit's white wire to the fan's white wire and then send the brown and brown-white to the capacitor. Am I on the right track?
