I have a Goodman Manufactured AC unit model #CK36-18 We had the motor run capacitor replaced last year and the service tech installed part #3GR0540. It appears to have the same problem this year and the capacitor seems to be blown (somewhat expanded) and the switch to kick in the motor kicks on and off without starting. Is the 3GR0540 the right capacitor? Is there another capacitor alternative that might be more readily in stock?