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If you want to do it the cheap and easy way, disconnect the two heater hoses that connect thru the firewall and onto the heater core and connect the two hoses with a coupler fitting. Get some rubber plugs or duct tape the openings to the heater core. This way, you will bypass the heating side al together during the summer months. When winter arrives, you can reconnect the heater hoses back to the heater core.
Wished that Chrysler would have install an auto bypass system so no hot antifreeze will have to flow into the system whenever cooling is called for in the cabin.
That's actually not a bad Idea. I think a more clean fix would be to install a bypass valve. I'll look into doing this as soon as I get moved. Moving to Grand Rapids Michigan in 2 weeks