me and you both (well you fixed yours i see) have the same issue and im betting the same thing for mine too but did you flush the system yourself or how did you get it unplugged cause the issues im having is no heat but im lossing coolant too but im not overheating were the same way?

 

I had them do a back pressure on the system, and it unclugged, and then they put a dye in the system to see if I had any leaks, fortunately there wasnt any.. I took it to the dealer, it cost me 200 total.. hope it helps!