I had a problem with the the AC fan, it would not turn off. I change the power module (the one that goes behind the glove box) and fixed that issue. After doing that all of the sudden my Pacifica heated up. I was driving when this happened so I stopped. Suddenly everything when back to normal (this happened last Sunday). I used my SUV again last night and it heated up again close to my apt so I was able to park it before the light on the dash came up, but the check engine light did come up. All this began after I replaced the power module. Any suggestions on this? Thanks in advance.