Auto Cool III 150 amp controller in Blue or black

Rated at 150 amps maximum DC current.  It has soft start, fail safe and a cool down timer.   Will power one more fans.  We have sold hundreds of these over the years.  Base size 4.7 x 4.5 inches.  Full year warranty!

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 Auto Cool HF-125

Blue or Black case

Our new high frequency 7000 Hz PWM controller rated at 125 amps.  Has soft start, fail safe and the cool down timer.  Base size 6x5 inches.

Auto Cool DX-150 

Our new push button PWM radiator temperature controller with 10 led to show percent of PWM.  It has soft start, cool down timer and fail safe.

Base size 6 x 7 inches.

Auto Cool 200 

Our most powerful PWM controller, rated at 200 amps.  It has the soft

start, fail safe and the cool down

timer. Base 8 x 5.5 inches

Auto Cool 85

Our 85 amps maximum PWM controller with soft start, fail safe and the cool down timer. 

Base size 4.7 x 4.5 inches.

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Auto Cool 55 

Our 55 amp PWM controller with soft start, fail safe and the cool down timer.

Designed or  6 and 4 cylinder vehicles not large V8 engines,

24 Volt Auto Cool III

For military vehicles, our 80 amp PWM controller with soft start, fail safe and the cool down timer.   Color in Desert Tan and olive green.  

Please watch this video before you purchase that brand X controller.  It will save you a lot of hassle, time and money. 

Mike in Brewster, MA is putting our Auto Cool III in this super Mopar to control radiator temperature.  He has become a repeat customer.

The Ice Box

This small device will keep your A/C fan speed constant with your A/C valve control voltage going up and down.  It will give you a constant +12 volt output to your controller's A/C input.   A blue LED shows DC output.  Designed for most European and BMW type cars.

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Case size:  3 X 3 X 1.75 inches.

The fan specs are, Derale 18217, 17” High Output pusher or puller without changing anything.  I only seem to hear the BUZZ when it is shutting down or when it is going slow.  Before I got the AC 85 I had wired low speed with one relay to key and hi speed with another relay and a T stat so it didn’t draw much on the relays but it ran from the time I started tell I shut it down. Yours is much more precise and reliable. I will try to do a video this weekend.

Thanks again

From the desk of

    Chris Mueller