C5 Coolit H2 and H3 Hard Wire High Speed Fan Controller for your 1997-2004 C5 and C5 Zo6

 For those that prefer to Hard Wire the Coolit Fan Controller in, we have developed the latest version of the Coolit, the Coolit H2/H3. It operates just like the original Wireless Coolit V series, but instead of using a FOB to activate the fan it uses a switch and LED light.

The Coolit H2/H3 allows you to control your C5 Corvette's radiators right side high speed cooling fan with a simple push of a button, allowing you to control your radiator coolant temperatures. No need to pay for an expensive tune just to change your fans on/off temperatures. When switched ON, the LED lights up showing you that your Fan is running.    

 We have spent a lot of time developing the Coolit H2/H3 to be as plug and play as possible.

After you install your Coolit H2/H3, you will be able to turn the right-side cooling fan on in high speed fan mode using the switch you installed making it perfect for when you are at the track and you want to cool down between runs, keep cool in traffic, and idling in parades. No need to turn on your A/C anymore to cool your engine and waste fuel and A/C wear and tear! The Coolit also allows you to keep the fan on above 35 MPH when the computer normally turns the fans off at that speed. It will even help keep your Automatic Transmission running cooler too! 

The Cool It H2/H3 WILL NOT interfere with the normal computer controlled operation of your cooling fans!

The CoolIt H2/H3 uses the cars factory wiring to run the high speed fan. Our Coolit uses the highest quality parts including a factory relay not an aftermarket or copy. All connections are hydraulically crimped, for high quality reliability. 

Installing the CoolIt H2/H3 will immediately take your C5 Corvette to the next level of performance and reliability. If you take your Corvette to the track and are serious about getting the best performance possible, whether hot lapping,  just cooling down in the pits or in traffic, the Cool It H2/H3 High Speed Fan Controller is an inexpensive must have accessory because cooler is better!

Note: Because the Hard wire Coolit is more complex to install than the Wireless Coolit, we recommend that before purchasing, you read the installation instructions below.

Click here to see if you need a H2 or H3

H2 and H3 PDF Instructions

Note: The Cool It H2/H3 will not fix existing overheating issues!

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. Read More

Delivery Time: All packages will be delivered within same day on most items if ordered before 2pm pt unless otherwise specified.

Order Processing: Your order will be processed for shipping within regular business days (Monday to Friday). Orders placed on weekends or holidays will be processed on the next business day.