My mom bought a house one year ago and this summer the A/C ran poorly, no more than 10* drop from ambient, leading to high electric bills and "random" shut offs near the end of the summer. She paid for techs to come out that told her everything inside was "new and fine" so the high pressure cutoff switch must be going out and needs to be replaced. Come to find out when I looked at the unit, the motor is a rescue motor rated 1/3HP, 220V, 4.1FLA, and 1075RPM. It has been seizing or slowing down more and more frequently, causing the high pressure switch to trip. Reset of the switch had been all that was necessary before but now the motor won't run at all. The plate on the unit specifies the original motor as 1/3HP, 220V, 2.7FLA but does not specify the RPM. The rescue motor was rated at 40*, which I presume lead to its quick demise in a position above the condenser coils pulling hot air over it. Not In southern Arizona with 40*+ ambient for weeks at a time.
I want to replace the motor but cannot find info on a unit of this model. I've been told it's a 4 Ton unit and I know the house is around 2500 square feet, nearly half as a basement. The only other info I have is that there only appears to be a run cap in the setup, no start. Can anyone one tell me what motor I need to properly replace the original?