Here there OP, welcome to the forum.
FWIW, I have been running Flex a lite fans with their VSC controller for many years without any tune or major trouble in my 99 k2500, using the probe in the radiator method and wired to the A/C compressor circuit. The VSC starts the fans slowly instead of giving them full power instantly which is nice feature. Have been in situations where I kept the engine idling for a hour or more at a time and have driven more than 26 hours on several occasions without issue.
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One of the "issues" that I do have with my setup is the fan controller doesn't account for vehicle speed. In the winter (it gets cold here/defrost) I remove the fuse for the A/C compressor at the under the hood fuse center, so that the compressor never comes on. But in summer time, if I am using the A/C while roaring down the highway at 70 MPH, the fans are cycling on and off with the A/C compressor when they probably don't need to be, which seems wasteful.
The other "issue" is short cycling, there is no minimum run time feature in my fan controller, so when the engine is idling the fans may come on for very short periods of time, like 10 seconds on then off for 30, then on for another 10 and so on. And when that A/C compressor is cycling on and off quickly so are the fans.
I recently purchased a HPtuner programmer and a couple credits for around 350.00 (unfortunately won't work on 1996) so that I can maybe eliminate the standalone controller and use my PCM to control the fans, hopefully eliminating the short cycling (minimum run time) while also preventing the fans from being used while the vehicle is traveling at higher speeds.
I was eyeing the dakota digital fan controller and OBDII interface which seems to be able to retrieve vehicle speed and engine coolant temperature from the PCM, eliminating the need for a separate temp probe, and to prevent the fans from being used at highway speed, but there doesn't seem to be a minimum run time with them and I can use the HPtuner for VATS etc etc, so I went that route instead.
Maybe dakota digital is right for the OP ?
"The
PAC-2800BT was designed for the ultimate in flexibility and to be a simple add-on in any application using an electric fan. Included is a 70amp relay, enough for even the most power hungry of cooling fans. Fully programmable, the PAC-2800BT will work with your existing water temp gauge, operating from the temperature sending unit already installed. A dedicated sending unit can be installed for applications without a water temp gauge. OBD II compatible vehicles can obtain the engine temperature from the ECM with the use of a BIM-01-2 (or previous BIM-01-1), purchased separately."
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Dakota Digital manufactures digital instrumentation and accessories for the automotive, motorcycle and car audio enthusiast.
www.dakotadigital.com
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Dakota Digital manufactures digital instrumentation and accessories for the automotive, motorcycle and car audio enthusiast.
www.dakotadigital.com
Something to think about if the OP is looking for a fan controller.
Best of luck.