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

Here are some handy tools for installing the Auto Cool Controller.

"Keep it Cool with Auto Cool."

LASER TEMPERATURE GUN

Use a laser temperature gun to measure your radiator and engine temperature. Point the spot on a black surface to have better accuracy. A bright or white surface will not read the correct tempature.

You can find these at Harbor Freight Tools and Home Depot.

DC VOLT METER

Use a DC volt meter to measure battery voltage. If you have an alternator not charging your battery, this simple meter could save you time to find the problem. Test your battery voltage with the engine running. It should be around 13.8 volts DC. If you find it at or below 12 volts with the motor running, the system is not charging. You could also have a wiring problem.

You can find these at low cost meters at Harbor Freight Tools.

DC CURRENT CLAMP METER

A DC current clamp is very handy to measure the current of fan motors. With Auto Cool Controllers, measure the full RPM current at 12 - 14 volts DC.

They can be found on Ebay. However be very sure that the current clamp you purchase will measure DC CURRENT!!!