I have a 2014 Durango and I've noticed my radiator fan always runs when it's raining when I'm stopped or barely creeping along. It's just like if you have the A/C on in summer. This happens whether the engine is stone cold or hot and never fails to come on if just a light rain or down pour. I've tried every combination of things like lights, wipers, A/C on/off and nothing changes the behavior.
I've tried to reproduce it on dry days with a spray bottle drenching the grill and wheel wheels with water thinking it might be short in the pressure sending switch for the A/C but no luck. I have the service manual it mentions nothing of the sort. At this point I'm stumped if it's a bug or feature and the logic of it doing this if it's designed this way.
I've tried to reproduce it on dry days with a spray bottle drenching the grill and wheel wheels with water thinking it might be short in the pressure sending switch for the A/C but no luck. I have the service manual it mentions nothing of the sort. At this point I'm stumped if it's a bug or feature and the logic of it doing this if it's designed this way.