It is time to replace the heater core on my TJ. I don’t have the time right now to get to it since it is my DD so I am going to bypass the core to keep the coolant out of the floorboards for now until the weather cools off In the Fall. My general question is, are there any side effects of bypassing the core with the AC? I rarely use the AC but it is nice to have when I need it. I know I have to evacuate the system to change the core but are there any problems running the AC without a functional heater core? Thanks.