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The On Line Store Page 1 below. . . .
The On Line Store Page 1 below. . . .
Contact the Auto Cool Guy: 562-367-3225 autocoolguy@yahoo.com
Please no text or voice mails
THIS IS HOW AUTO COOL CONTROLS COOLANT OUTFLOW TEMPERATURE WITH FAN RPM
The Auto Cool Guy has a better way to control engine temperature.
We use Pulse Width Modulation of your fan to control its RPM. Our sensor monitors the radiator outflow temp and adjusts the fan RPM to keep the outflow at a constant 15 to 20 degrees BELOW the thermostat temp. This way, the thermostat can regulate engine temperature. Use a laser temp gun and put the red dot on the outflow area and on a black dull surface for good results as you adjust the BLACK knob. Avoid shinny chrome surface due to temp errors. Take your time and do not rush this setting. After you have made this adjustment, you should see ROCK SOLID engine temperature. You will notice speed and motor load will effect your fan RPM - see its working.
By the way, fans with Auto Cool controllers do not KICK ON and off, leave that to the brand X controllers. Please don't tell me your Auto Cool wont KICK on.
FEATURES AND CONTROLS:
Soft Start limits inrush current with pulse width when the controller is powered up. Inrush current is a brand X controller killer when starting a fan motor from a dead stop.
A/C FAN SPEED control has a small pot on the side of the controller. When 12 volts is applied to the A/C controller pin, use a small flat blade screw driver to set this fan speed. The radiator temperature control mode will over ride the A/C fan speed automatically. If not used not a problem.
FAIL SAFE: The fail safe mode turns the fan on full RPM. The FS mode is turned on by grounding the FS pin. Use a small switch from FS to ground. You can turn FS mode on or off any time.
COOL DOWN TIMER: When you turn off the IGNIITION, the fan will keep running for a period of time to cool down your radiator and then shuts down.
FAN BUZZ: The buzz is caused by the fan blade and the armature shaft not tight.
We have found the Mark VIII fan have been reported at no buzz fans.
Our HF-125 controller runs at 7Khz to prevent the buzz but may have a high frequency tone cured by a large filter cap you see below. If your fan is brushless, use our HF controller only. The fan will vibrate at low RPM with low frequency controllers.
START ENGINE: As the motor and radiator is getting warm to hot, the fan will start turning slowly and gain RPM as the temp rises. The RPM will hold at the point of regulation set by the black knob.
DIESEL RADIATOR TEMPERATURE CONTROL
One of our early customers made this Youtube on the HF-125. At first we had a Fail Safe issue but corrected it and any that had been sold. This 7 Khz controller is one of our fastest selling controllers. Video made 2-2021
I made this video of the DX-150 - how it works on the bench. It has ten LEDS that show percent of pulse width modulation = controlling radiator temperature.
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.
This black box is our new fan filter F-101. it's 3X7 inches, it has internal resettable fuse, reverse polarity protection and has a 10 MM red led on the cover that indicates fan RPM. The two 10-32 brass terminals are connected to your fan or fans. It should take out the BUZZ and the HUM out of your fan.
The photo on the left is the Auto Cool Guy. Location was north of Quan Tri City just south of the DMZ. Photo on the right is a cobra gun ship spraying the Da Nang perimeter thinking Charlie was going into our base camp, All they found in the morning was a dead water buffalo.
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.
