How the Auto Cool controllers operate:
The sensor measures the OUTFLOW temperature of your radiator
and then sets the fan RPM to regulate the OUTFLOW temperature you have dialed with the black knob. So if you have set the OUTFLOW temperature
10 to 20 degrees F. below your thermostat temperature you will have rock solid engine temperature. Use a laser temperature gun at the OUTFLOW to
check your regulation. Check it parked and motor at an idle.
Also keep in mind, that three things are going to effect the fan RPM.
First is your speed, second is motor loading, and outside air temperature.
Starting your engine for the first time you will NOT see the fans start.
I do not want to hear the BS term "KICKING ON." When the radiator has reached about 140 F, +/-, the fan or fans will start to turn slowly. The fan(s) will increase RPM and reach the point of regulation that you have set with the black knob. For A/C fan speed control, there is a small pot on the side of the controller that sets this fan speed. The radiator control will over ride this fan speed.
Our controllers have Soft Start that limits inrush current from starting a dc fan motor from a dead stop. This is what brand X controller boys fail to realize and why their controllers keep burning out. Auto Cool also has a cool down timer, so when you turn off the ignition, the fans will operate for under a minute.
YOU CAN REACH US VIA THE PHONE OR
EMAIL JUST ABOUT 7 DAYS A WEEK.
DARRYL THE AUTO COOL GUY
562-367-3225
If you return a controller or a sensor for test or repair, please put your full information in the package with name, address, email and phone number!
It will prevent long delays getting it back to you!
The On Line Store Page 1 below. . . .
The On Line Store Page 1 below. . . .
If you run a brush type fan with the HF-125 and it hums at 7Khz, we can stop the hum with special capacitors.
If you run a brushless fan on a low frequency controller, the fan blade will vibrate at low RPM. Brushless fans should be powered with the
HF-125 controller at 7,000 cycles per second.
If your fan has the buzz, it because the fan blade and the armature is not solid. We find this with the over the counter fans from auto supply companies in general.
The cure is the Buzz Box or go with the HF-125 PWM controller.
Some of the best fans are the Ford Mark VIII fans. Find them at junk yards, Ebay or other parts companies. The Mark VIII have no buzz problem that we have found. The Mark VIII fans can be found in the old Lincolns.
The Mark VIII fans have two speed wires. You will only use the HIGH speed and GROUND wires with any of the Auto Cool Controllers.
The Auto Cool Guy now has these special capacitors to cure the high frequency 7,000 Hz tone in you fan.
One each is included with the purchase of the HF-125 controller.
Be sure to get the polarity correct across the two fan wires. Its sold with the clamp and terminals as you see. Install one per fan only. You will notice that the fan will start to turn very slowly as the radiator is warming up - this is normal.
Use these caps only with the HF-125 controller if your fan has the high frequency tone problem.
Hi good morning Darryl The Auto Cool Guy, from the Philippines Islands. Here is my HF-125 up and running smoothly on my 2000 LN166 Toyota Hilux 1kz-te diesel engine with rear mounted radiator beats that heat in the PI!
Best regards, nelbin binag
DIESEL RADIATOR TEMPERATURE CONTROL
I made this video of the DX-150 - how it works on the bench.
Sensor Warning: If your radiator OUTFLOW port is plastic, do not use the Standard Brass sensor. It will not get true heat transferred to the sensor! This will result in very low or no fan RPM.
US ARMY ORDINANCE:
CALLED UP FOR A TOUR IN SOUTH EAST ASIA AND ASSIGNED TO THE 295TH ORD. FROM HASTINGS & GRAND ISLAND, NEBRASKA
10-68 TO 10-69.
The photo on the left is the Auto Cool Guy. Location was north of Quan Tri City just south of the DMZ. When we were out of our base camp we always carried our M16s and at least 8 clips of .223 ammo with 20 rounds in each clip.
The photo on the right was taken one night outside of our hooch in Da Nang. For some reason I loaded 35mm high speed slide film in my camera and had it mounted on a tripod ready to go that night. As we were drinking beer and such, all hell brook loose and the sirens went off. Then we heard one of our NCOs telling us to get into our bunker. We answered back to this NCO that we were busy drinking and taking war photos. With my camera and standard lens I shot this time laps photo of a Cobra gun shop spraying 7.62mm rounds on the Da Nang perimeter. In the morning all the MPs found was a dead water buffalo. So you see all the fun you can have in the Army!
We have been building pulse width modulated radiator temperature controllers right here in the USA starting in 2011. We design and build quality and what the customers want!
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.
Attention Australian buyers: The cost to ship controllers to your country has gone way up! Fed-X will be the system used from now on. We will get a shipping cost and email you the added expense. There may also be a delay in Pay Pal payments to us. What a bloody mess!
October 19, 2017
Creative Bus Sales in Chino just purchased eight new Auto Cool III controllers to be installed on new trolley buses for the Riverside Transit Authority. RTA requested Auto Cool III controllers to be installed based on the track record of the Ford F450 & F550 buses.
The Auto Cool Guy is now supplying the Auto Cool III controller for brand new Ford F450 & the F550 buses that run on natural gas, propane and gasoline. A total of 36 new buses are being retro-fitted by Creative Bus Sales in Chino, California for the Riverside Transit Agency. The stock Ford cooling system has a problem with over heating in the hot summer months in Riverside, California. The Auto Cool III has proven to be very reliable since the first controller was installed last October 2014 at Creative Bus Sales in Chino, California. Above photos taken on 10-20-15. Eight more Auto Cool III controllers were sold to Creative Bus Sales in November 2017
Michael in Brewster, Ma. just installed our Auto Cool III in this super Mopar. He replaced the old relay control system that failed.
Hi Darryl, 3-7-2016
We finally have your Auto Cool III installed in the car. Great news, it works flawlessly, exactly as expected, and has solved our problem running our power-hungry Derale 16825 Dual Fan assembly. These fans draw a lot of current on their own and just having them on a simple on/off fan controller resulted in huge electrical draw (lights dimming, etc.) every time they engaged. Not to mention they howl at full speed.
See Joe's remarks on his new Auto Cool III on our EMAIL page.
Greetings Mr Darryl:
Here are some new pics of my 6 year Mustang build and the installation of your controller. It works great as expected. Thanks so much for the outstanding customer service. Salute rendered.
Thanks, Jefferson USMC
The proud owner of this Porsche installed the Auto Cool III Controller in Australia to control his radiator temperature.
After the Auto Cool III was installed in this Aston Marin in the United Kingdom, the owner remarked that this is the first time he could run the air conditioning in slow traffic!
This is a super mint 1955 Chevy with a 570 cubic inch motor, a GMC blower and it has the Auto Cool 85 to control the radiator temperature. Note the lower right photo that shows the 85 amp controller installed in the back seat floor board. The shop put in two 13 inch Spal fans behind the radiator.
Hello Darryl:
Your Auto Cool III still works perfect, all the time. I actually like all its functions.
One thing it does that Derale’s doesn’t is control the fans even when the a/c & heat fan switch in the cab is turned off.
Jamie Allen
Las Vegas, NV
Alex has one of the cleanest Datsun Z cars around. He purchased the Auto Cool II (left photo) and then up graded to the Auto Cool 50 controller in the right photo. This Z shows real pride in owner-ship. Note to all Z owners. If you are looking for quality used Datsun Z parts contact Mark at Mike's Z Shop in Whittier, California.
Darryl in Pasadena installed the Auto Cool 85 in his classic Jaguar! Now the radiator and engine temperature is nice and solid were it should be!
This is Dave's Jaguar Challenger E type in the United Kingdom. He installed the Auto Cool 50 controller to keep the radiator temperature constant. This would be a rare car to find in Southern California.
This is Brian's classic Mustang with the Auto Cool 85 radiator fan controller. Brian told me that he had to watch his volt meter drop every time his old relay controller swithed on the fans. However, that all changed with his Auto Cool 85 controler seen in the upper right corner of the right side photo.
Brian remarked in an email:
"I'm used to watching my voltmeter go from 14.2 volts (with the old relay controller) to immediately under 12 volts whenever my fans kicked on. Now I keep psyching myself out that the fans aren't operating or something has malfunctioned since I don't notice a major current draw at all." "Even at their peak current draw the charging system is still happy above 13 volts." "Brilliant job on this pulse width modulation controller."
This is a classic 1975 Blazer that has the Auto Cool 85 controller installed. It belongs to Rob in Vancouver, Washingtion. He used the Griffin Radiator, Custom Shroud designed by DK Customs, two Spal 12" Extreme 2000 CFM each. Sits in a Classic show quality 1975 K5 Blazer. Rob's email quote: "Thanks again for all your help and a great product."
The Auto Cool 85 was installed in this mint Mustang and you can see it in the upper right corner of this photo.
This is a classic 1965 Mustang with the Auto Cool III controller. It also has two Derale fans and a quality aluminum radiator.
9-25-2016
Hello Darryl,
Today I have my first ride with the new fan controller. We had 86 degrees and the water temperature never went above 200 degrees. Usually at these temperatures, the water temperature was always too high, especially in stop and go traffic, but today there was no trouble and I could enjoy the ride. Thanks for this great product. I have the controller already recommended my Mopar-Friends.
Grüße
Andreas
Germany
Auto Cool 85 has become very popular in the past year with its pulse width modulated fan control. The Auto Cool Controllers monitors the radiator's outflow port and adjusts the fan(s) RPM in a CLOSED LOOP temperature control system. By keeping the temperature of the radiator CONSTANT, this will prevent the "working" of the metal in your radiator.
Here is a classic Ford using the Auto Cool III for positive radiator temperature control.
