I'm running Flex-a-lite 295 electric fans on two of my trucks. The controller for the fans has a provision for A/C. A wire is piggybacked off of the wire that engages the clutch on the compressor. Here's a link to Flex-a-lites page with instructions. Skim down to the 295 and it will pull up the instructions detailing the install.
http://www.flex-a-lite.com/auto/html/instructions.html The fans run when the engine reaches the predetermined engine temp and they also run when the clutch is engaged. All the piggybacked wire does is send a signal to the controller so the fans kick on. I see no way that having them wired this way would cause one or the other to wear out quicker. Of course what the heck do I know?? I work on an assembly line building ranges not servicing A/C systems.
I do know that I've got two trucks that I've been running like this for years and they've both got cold A/C and they don't run hot. If you two want to keep arguing, come on over! I've got some beer in the shop fridge ya'll are welcome to it! I'll just sit and watch!
Peace guys!
