I was getting an E183, over current message, on my Nest Home Thermostat, whenever I tried to put the AC on. Heating worked fine. At first I thought I needed a new Thermostat, but that didn't fix it. After some more investigation, I saw where it might be the Contactor or Capacitor. I replaced both. My existing Contactor was a DP23024F by IRP. Very old. I got the BOJACK with the same specs. My old Contactor had the contacts labeled L1/L2 and T1/T2. The BOJACK had no such marking. I didn't want to connect it up incorrectly. Anyway, after a some intensive searching and watching YouTube videos, one guy said that if there are no L1/L2 or T1/T2, that meant you could wire it up on either end, and it made not difference. I wired it up, replace the existing Turbo 200 capacitor, and it worked great. AC working fine with no issues for the past few days. Once final comment. I was getting a buzzing sound from the circuit panel. I determined that the outside pullout / cutoff was not in solidly. After adjusting the outside pullout, no more buzzing in the circuit panel. Great product. well built. works great.