Electromagnetic interference aka "EMI"

This invisible problem has effected audio equipment, ignition systems, fuel injection systems, and even alternators. The wire from the controller to your fan is emitting this EMI invisible noise. The best way to deal with this is to shield the wire from the controller to your fan. See our MORE/PDF on this EMI cure.

We received this email from Frank on his alternator EMI problem:

"Its hard to count the number of people who insisted that either the alternator or your controller was defective. No description of how or why, just EMI can't do that!

If I ever do this again, I'm buying shielded wire to start with!"

Before you purchase that brand X controller, check their DC current rating and history of failures! The Auto Cool Guy starts at 55 amps - to a monster 200 amp unit!

The On Line Store Page 1 below. . . .

DIESEL RADIATOR TEMPERATURE CONTROL

The Auto Cool DX-150 for push button radiator temperature control.

* Rated at 150 amps max

* 10 LEDs show % of Pulse Width

* Temp memory hold when off

* Push button temp control

* Soft Start limits inrush current

* Cool down timer on or off

* A/C fan speed control

* No calibration required

* 1/4 inch brass studs fan & ground

* Use any of our sensors

* One year warranty

* Base: 6.0 x 7 inch

Our brand new HF-125 controller.

* Operates at 7 KHz (7,000 cycles)

* Constant radiator temperature control

* High frequency = no fan buzz

* Order yours in gloss Black or Blue

* Rated at 125 amps max

* Standard rotary pot to set temperature

* Soft Start limits inrush current

* Cool down timer on or off

* A/C fan speed control

* No calibration required

* 1/4 inch brass studs fan & ground

* Use any of our sensors

* Heavy 1/8 inch aluminum case

* All our controllers are made in the USA

* One year warranty

* Base: 5 x 6 inches

Make sure you send us your mailing address!

Be sure you email the size sensor you need!

We are not getting Pay Pal notes?

The Auto Cool Guy is

# 1 in customer service!

call or email 7 days a week!

562-367-3225

please try to avoid voice mail!

Auto Cool controllers

are proudly made in America!

The Auto Cool Guy supplies the Standard Brass Sensor with your controller.

However, if you purchase a Brass Plug Sensor or one of the Copper Inline Sensors, we do not supply the Standard Brass Sensor as the default sensor with your order.

Send us an email on the size of sensor you have ordered! We are not getting the pay pal notes?

We get a vast amount of calls and emails from pissed off guys that purchased the brand X controller from that

"Racing Company."

The Auto Cool Guy

ends up selling them a reliable Auto Cool Controller!

Patch of the First Log Command, aka, the leaning S**T house. Our mission was ammo supply from Chu Lie to Quan Tri City.

USS MADDOX DD731

GULF OF TONKIN 1964

The new Auto Cool 200 is now in production!

Designed for Diesel motor homes, semi-trucks, and large

motor cooling requirements.

Watch this YouTube video that compares brand X to our

Auto Cool 200 Pulse Width Modulated controller.

Caution: language may offend some viewers in this video!

I

The Auto Cool 200 for diesel radiator temperature control:

* One year warranty covers parts, labor or exchange.

* Pulse Width Modulated fan RPM radiator temperature control.

* Soft Start limits inrush DC motor starting current.

* Save energy and fuel with this "Electronic Fan Clutch."

* Radiator cool down timer - 1 minute after the ignition is switched off.

* Fail Safe will put fans into high RPM with small switch on dash board.

* This is your electronic fan clutch system.

* 1/4 inch brass bolts for FAN and GROUND terminals.

* A/C fan RPM preset with small pot on side of controller.

* Radiator temperature control will over ride the A/C fan speed.

* Use all standard sensors from the Auto Cool Guy.

* Rated at 200 Amps.

* Powers one or more fans to 200 amps.

* Fused at 250 Amps.

* Internal jumper between FAN A and FAN B.

* Made from .125 inch aluminum plate top and bottom.

* Made with brass and stainless hardware for rust prevention and long life.

* Case size: 8 x 5.5 x 2.4 inches.

* Weight: 2.4 pounds.

* Cover is powder coated.