My condersor fan was trying to turn very slow. I removed it and oiled it and it freed up. Only ran 30 min then quit. Compressor still running.replaced fan motor it had a 1/3 hp installed a 1/4 same amps and rpms. Would run 50 min then quit. Replaced capacitor it was a 40/7.5 it ran but no cool air. After 40 min air got cool all the sudden and heat finnally came from the condesor. Ran 10 min then the condenser fan quit. Comp still ran. I don't know what is wrong. Help please. Thanks