I have a 200 vert. I have to turn on the ac in stop n go traffic so the temps won't go above the 220 degree mark. When I do this, the temp goes below the 220 degree mark. That's how I get the fans to come on. Can someone tell me how I can change the fan settings. I thought my fan was going bad. I was about to replace it when I read a thread about a lower tem stat. I thought I would try this first before I purchase a new fan. I think the previous owner may have raised it. Thanks for your help.

 

I've had success using a 160 t-stat and programming the fan settings to come on at a lower temperature. I used LS1 Edit; however, your GM tech may be able to do this for you.

 

What do I need to buy to perform this task on my own? I have'nt found a reputable mechanic yet.

 

The radiator probably has a bunch of garbage in the fins between the condenser and radiator, or up high on the front of the radiator (look up in there from underneath with the car on jack stands). You probably need to clean it out. My car only has 6500 miles on it and I was surprised how much junk is in there...

 

That was the first thing I did. It was alot of dirt and grass clippings in there. Temps still rise just sitting in the driveway at idle.

 

If you want to lower the fan settings, you need a handheld programmer. I have a Diablo Predator for sale that allows you to reprogram the fan settings. If you are interested, send me a PM.......I can explain more.

 

I have a C5, year 2000, Hypertech III handheld programmer that will adjust those fan turn-on/off points for you. It's very simple to use. It has optimal settings for the 160, 180 and stock thermostats. It also will allow you to program a ton of other stuff, if you wish. I will sell it cheap....a lot cheaper than you can pick up a fan controller or another programmer for. Let me know if you are interested. It has been returned to stock and includes box, directions, decals, cables, etc. It's like brand new. The only reason I'm selling it is that I had a head/cam job done on my car and had it LS1Edit dyno tuned. I don't need it anymore. PM, email or post back to this thread and I'll get back to you right away.

BTW, I agree that the cars get awfully warm sitting in traffic. However, the upper limits on these fans are factory set at somewhere around 226 degrees! That being said, there is an optimal setting, for the stock thermostat, with the Hypertech programmer that will lower that stock fan setting and allow the car to run cooler. If you want to go lower still, you can out in a Hypertech 160 or 180 degree thermostat, and the Hypertech programmer will optimize the fan settings on these for you, also.
Ed

 

How much for your programmer?

 

I have the Vinci fan switch, set to come on at 208 and it goes off at 201. Kept the stock thermostat.

 

PM sent to you.
Ed