C-5, factory fan settings
 

Hello,
Can anybody tell me what the FACTORY fan setting temps are for a 2004/C-5 ??
It seems to me the high comes on at 230.. but I can not find the low and high.. on and off.. factory values..
Help is appreciated..
Thanks.. MajorMike

Mine seem to run pretty strong at low temps (180 or so) and seem to never shut off. Is there a sensor somewhere that I should be looking at or is that logic built in to the ECM?

A/C on? If you run the A/C and the car is at temp, the fans will pretty much never turn off until you're cruising.

No, I get it with the AC off. I know there is an issue somewhere, but I've taken the approach, better on than off. It does need to be addressed this spring.

As always thanks. I did a flush over the summer last year and cleaned out the radiator and condenser of all the debris that finds it's way there. I also put a new thermostat in it hoping to correct the problem, but it didn't do anything. I have a guy that has tuning equipment, so I'll have to make an appt to get it check out. Thanks again. Rob

Could be that your coolant temp sensor is wrong too...
And most the aftermarket hand held tuners WILL allow for different fan settings
They do it in a roundabout way kinda... They ask what TStat temp you are running
and adjust the fans accordingly
You've def got a problem somewhere if your fans are ON at 180* and ALL your
climate controls are OFF.... I'd figure that specific issue out FIRST before you do
any aftermarket tuning

Big thanks to 8vette7 for the factory settings.. turns out my local Chevy Dealer has a Vette tech guy that is pretty good.. He said he had reset the fan speeds on MANY vette's.. happy with results AND the re-learned the TPMS too.. now that works.. Also.. have many more page options on my Heads Up Display.
Tech said it just needed a couple of "Tuners" ? ( something either IN the computer or connected) not sure what those were.. but lots of things work much better now so guess it was needed... $330.00 parts and labor.
MajorMike

Thank you 8VETTE7 you save me from purchasing a Tech II as i want to lower my cooling fans on/off setting and now i see that a Tech II can not change the fan settings , what is the best way to reset them ?

Search function....................well, nevermind

8VETTE7
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found the info from 8VETTE7 , thanks again

Quote:



I have heard that there are some hand held programming tools that can reset the turn on/off temps but I do not know the brand names that can do that. The ones I have heard about cost $300 and up.

There are programming software tha run on a PC that can do that as well as change other parameters in the PCM. Two well known ones are HP Tuners and EFI Live. Both are pretty expensive and require more than a little knowledge to use. Many tuners will charge you around $100 to change parameters like the fan turn on temps, CAGS elimination if you have a manual trans, reset column lock fuel shutoff speed, etc. That cost is largely due to the cost of the software license since they are licensed per VIN. Their time to do simple things is small. Before I had my car tuned (had a Maggie installed) I did have the CAGS eliminated, fuel shutoff speed set high and the fan turn on temps changed lower and the tuner spent less than 5 minutes and charged $100. I think it took more time for his laptop to boot up than the actual changes.

I'm curious about these additional HUD page options, I've never heard of such a thing. Can you elaborate?