Installed a new capacitor last week and the air would come on sparringly. The capacitor is different from the one that was bad, a plastic grey one with a lip that fits into the hole of the rheem unit. The new one is a protech 55/5-mf 370v. The new capacitor reads 55 mf and 4.7 mf when checked. I'm getting 242 volts to contactor when testing L1 and L3 and when I engage the starter bar T1 and T3 reads 242 volts, turning the fan and compressor on. I cleaned the contactor with contactor spray. What am I overlooking?