My outside ac fan will not come on if you put the thermostat in on you can jump start it, if you put it in the auto position it will not jump start or do nothing, bloower running fine.

Why is your fan on switch controlling your outdoor unit? Make and model number??

It just won't cool the house, the blower is running normally but the outside fan won't come on, on its own, if I put the fan switch to on, it will jump start, if it is on auto it tries to spin but cant. I have changed all 24v wires, had trouble with the blower first, changed moter, new thermostat, changed out all capactators, burnt 3 transformers before changing motor, now I set no air still, it's a gas furnace, lennox gs

Lennox gas furance gs18 the outside is a lennox also

Okay, contactor was burnt which blew my transformer, all new and working good!