coolerguysDual 120x120x25mm PWM Fans with PWM Thermostat Controller Kit

These fans worked great and are quiet. I installed these in the cabinet holding my DC refrigerator in my Aligner. The installation / programming instructions were non-existent. I looked on the CoolerGuys website and from an excellent write up from another Amazon customer for instructions on programming.The one thing I did not like was the lowest turn on temperature was 30C (86F). I really wanted a turn on temperature of 20C (68F).Also, the circuit board does not have a housing / case. I 3D printed a protective case for the circuit board.Overall, this is a very good product and relatively inexpensive.

I bought a Lian Li DESK/CASE. You can lower or raise the desk, that has a glass panel so you can see the pc components at work. On the left side is a pretty good sized hole 4x4 hole, for the power cord from the desk motor goes through. My CPU and GPU put out a lot of heat, so I put this fan thinking I would set the thermostat to kick on when needed. Instead I bypassed this and plugged it into a motherboard fan header, where I can control it if I wish. I made a shroud, due to it being elevated past the width of the cord, and so no airflow would escape. It works great.

Very quiet operation, nice "ramp up" function depending on temperature. Instructions are terrible, but as another reviewer pointed out, the manufacturer's website as some slightly better instructions. Nice to have guards for BOTH sides of EACH fan and the mounting hardware in the package!

These fans work well. One has been in use on my boat for over 6 months now without issue.

since I had issues figuring the PWM temperature controller out, I figured I'd share the programming info from their website, which is much more clear."HOW TO IMPUT SETTINGSPlug PWM Fan in, Connect 12V Power, Red to +, Black to -, if fan spins... continue.(Plug Thermocouple in after programming to enter normal operation)How To Enter Programming Mode:First button short push ——— Base fan speed (fan speed when cool - power on)Long button push- (slow flash) Trigger temperature (temperature that fan begins to speed up)Long button push- (medium flash) Temperature range (temperature spread from trigger point to 100% fan speed)Rapid flash - (Ready to save) —————— Followed by long button push, saves setting.(Settings NOT saved within 20 seconds will be lost!)Setting Base Fan Speed:(The speed the PWM fan will run when the power comes on, and unit is cool)-Plug a PWM fan into the controller.Connect 12V to Power On controller - LED #2 lights up = General operationSingle (short) button press increases Base Fan Speed by 5% - LED #3 lights up momentarily.Double (short) button press decreases Base Fan Speed by 5% - LED #1 lights up momentarily.When LEDs #1 and #2 light up together, the minimum Base Fan Speed has been reached.When LEDs #2 and #3 light up together, the maximum Base Fan Speed has been reached.After every action, LED #2 will flash rapidly, indicating a new setting is ready to be entered.When the desired speed is reached, HOLDING DOWN the button until LED #2 is stops flashing, saves that setting.(Settings NOT saved within 20 seconds will be lost!)Setting Trigger Temperature:(The temperature that the PWM fan starts to speed up over base speed)Connect 12V to Power On controllerWith LED #2 ON (not flashing), hold button down until LEDs start to flash slowly, then release the button.Now each short button press will cycle you through the different temperature settings in oC as indicated by the LED pattern (see chart,2nd column).When desired Trigger Temperature is reached, hold button down until LEDs stops blinking, to save setting.(Settings NOT saved within 20 seconds will be lost!)Setting Temperature Range:(How fast the PWM fan speeds up to 100%, based on number of degrees oC over Trigger Temperature)Connect 12V to Power On controllerWith LED #2 ON (not flashing), hold button down until LEDs starts to flash (flashes more quickly than Trigger settings), then release thebutton.Now each short button press will cycle you through a temperature range in oC as indicated by the LED pattern (see chart, 3rd column).When desired Temperature Range is reached, hold button down until LEDs stops blinking, to save setting.(Settings NOT saved within 20 seconds will be lost!)-How this works-How this works is, as an example, if you set your Trigger Temperature to 50oC, the fan will start to speed-up when this temperature is reached.Now if you wanted your PWM fan at full speed (100%) at 70oC, you would set the Temperature Range at o20C.This give your PWM fan a range of o20C to ramp up to full speed from the base speed.If you wanted a more gradual ramping up of your PWM fan speed, but you still needed full speed by 70oC, you would set the TriggerTemperature to 30oC, then set a range of 40oC, making the increase in speed happen over a wider range of temperature.Now if you want a faster increase in speed, with your Trigger Temperature at 30oC, then you would set the Temperature Range to a lowerrange, like 15oC, which would make the PWM fan run 100% at 45oC."

Fans are great, but the thermostat is impossible. Throw it away and spend a few more bucks on a t-stat that has a numerical display.

As a certified mad scientist... I didn't invent the flux capacitor- But I did figure out how to make it work with solar power.Intermittent failures, of any electronic device, are more often than not, a result of heat.Because in the real world a constant load and operating temperature are not ever realistic....This device makes good sense-Automatic Variable, (on demand) meets the specifications for any application.I have 3 of these kits and will likely get more.

Fans are quiet, both are being used to coo a mobile network unit. Low consumption and temperature sensors works as inn.