Ok so about a week ago i bought an 07 caliber auto(cvt)
A/C worked while moving, i figured it was low on freon or something, trans felt fine and so did everything else. well on my way home, after about 20 minutes of “highway” 55 mph driving i got on the interstate. Went 75 for about 10 minutes and the trans temp light came on. pulled over, had my buddy come tow me home.

First thing i did the next day was change trans fluid and both filters. Yes i did it correctly, i bought the measuring dipstick and my scan tool read the trans temp, used oem fluid too.

Took It for a drive, A/C off, monitoring the trans temp, stayed at about 174 F at 65 mph, fixed right? Wrong.

I come back, decided if i want to really test it im going to need to hit the interstate, i take it for a drive, this time A/C on. By the time i got to the gas station down the road it was at 180 Already

Thought is just to highway speeds again, got up to 265 F and obvi the light came on and i limped it home. Only to realize the rad fans are not on at all. Checked the fuse, it was fine. Started digging a little more online and found that there is a fan relay box in the driver wheel well, i go to look, and it’s just hanging there… corroded…. and missing a relay.

Well yesterday i went and got all new relays and cleaned the box up(not satisfied i’ll probably repin it today to be sure), and now when the a/c is on, only one fan will come on.

So that’s where i’m at, i know the a/c and trans share the condenser for the transcooler, so what’s causing it to overheat? i’ve heard those lines sometimes get crushed, but are they the coolant lines to the water to oil cooler or the trans fluid lines to the condenser/transcooler?

 

If the 07 has dual fans, that may be the issue with only 1 running. They should both be on with the a/c.