In adding to windrushno1's post (and hoping it helps others from stressing) I also went ahead and bought the Dorman 621-392 BEFORE I read the issues others experienced with this same fan product. . . tin short, my fans went south and I was experiencing similar issues as others, especially with the AC not working. Noticed overheating at low speed or during idling. One fan would spin if I nudged it with a stick (Obviously I was parked when I was doing this) Bought the Dorman and installed it. . .started up the 09 Edge and NOTHING! Checked all the connections and realized the main connector wasn't going in fully. I pulled it out and pushed it in several times and it appeared to me that something was not allowing it to seat properly. On the last pull I heard a "snap" and noticed the white internal "cap" had snapped off of the harness and was now lodged in the module end of the connector. Assuming that this may have something to do with the contacts not connecting, I pulled out the white cap (threw it away), plugged the harness back into the module and holy smokes. . .the fans ran like a champ when I started the car! When I plugged into the module, I noticed that the plug went in further than previously, making solid contact with the leads. So it may be useful for some owners to pull the internal white cap from the harness plug (female end) and plug it in for a better contact seat. I think windrushno1's method of "shoving" the plug in resulted in the same answer. . .the leads need to make contact and the 621-392 should run just fine.
Overall, thanks to everyone for sharing their experiences with this issue. It really helped me isolate the problem and find a fix. I was considering buying another fan model until I did a bit of reading and, well. . .now I'll see how long the Dorman will last!
