Why would a repairman install a 1/3 HP fan motor into a 1/5 HP unit? He had to cut the shaft to make it fit. Two weeks later unit quit again and then he had to come and replace the capacitor MFD (whatever that is). I found all this out from a different company's A/C tech when it quit again 2 months later (fan had also been put back in backwards and damaged).
Probably I should mention the original repairman tried to sell me a new A/C from the start, "when parts start to break it's time to replace the whole unit". When I told him our house was only 4 years old he said that's as long as they last sometimes.