E-outstanding Temperature Controller DC 12V Digital Cooling/Heating Temp Thermostat -50-100 Degree Controlled Switch Module W1209 + Acrylic Box

Exactly what I needed. I live in Texas where it gets so hot the roads get soft in the summer. In my truck I installed a fan to keep my sub amp cool during those hot days. I was controlling it with the ignition switch. My kids mentioned it’s really noisy in the back seat. I have a 2007 Tacoma crew cab. So this little controller is what I needed. First I got a led light and a 12vdc power supply and bench tested and verified the temp read out. It worked perfectly. So I set it up to 40c (104f) and installed it in my truck. I installed the temp probe on the cooling fins. After playing some DJ Magic Mike the temp only rose up to 37.5c. So I’m still waiting for a hot enough day to truly test it. The bench test passed with flying colors. I will check back in a couple of months from now with an update.

Programing was not easy with no instructions. I put it in a 11 meter radio to turn on the cooling fans when needed.

Went together easily. Powered up on test bench, Checks OK. set the setup temperature and connected the fan load. Works just fine. Be sure that you look at the diagram for this item to wire it correctly. Great price for a controller.

This product came unassembled and did not include instructions for assembly and programming.

I bought this to control the fans for the lights on my aquarium and it’s working perfectly. I have a heavily planted tank and the lights can raise the tank temperature sometimes but this little thermostat kicks on and cools them down then cuts the fans off when they’re cool. It does use Celsius and it doesn’t come with instructions but it’s not that hard to figure out.

I have around 400 watts running through this controller. At first it was incredibly warm with one unit on running on it. After i placed a heat sink on the relay and removed some of the case pieces for better air flow it was working well and not hot. When the load was doubled the relay became so hot the solders floated. I could move the relay freely. I have some fans coming in to try and manage the heat before i shop for another controller. I really like this one so, hopefully i wont have to shop around.Update: after attempting to keep the unit cool it ultimately failedUpdate: the relay being the point of failure i decided to order another board(this time in blue), then simply have the relay on the temperature controler switch on a 40amp relay which in turn handled the load. Board runs cool and absolutely no problems. So if this board cant handle the load, move the load to another component that will.

This thing just works. It's that simple. Connect the appropriate relay for the load you will be pulling, mount the sensor in the correct spot and set it up. That is the last I had to think about mine.

I love this product! I have built several of these into my projects for amateur radio. The controller closes the N.O. contacts (K0 to K1) depending on where you set the temperature on the led readout. It does not provide any voltage to the contacts, however you can just jumper 12v to one side of the relay (K0) and when the relay closes, it will provide 12v to your device on K1. Easy-Peasy. My only gripe is there is NO MANUAL included, so after a bunch of button pushing, you will figure it out. (Three buttons = SET, +, -) I did play around with it and if you HOLD a button, you enter different mode(s) to maybe set C or F but I have never gotten it to stay in Fahrenheit mode. I just google C to F and set it to the desired temp. One last gripe is the sensor cable is not very long (12"). I wish it was longer.

I used this thermostat for a 12V fan that I needed to install to keep the area of my inverter cool. The fan turns on at the set temp (28C already preset) to cool down and turns off when it reaches the cooling preset temp. And turns on at 33 C and stays on until reaches 28C.