Digital LED Temperature Controller Module, XH-W3001 Thermostat Switch with Waterproof Probe, Programmable Heating Cooling Thermostat (12V 10A 120W)

This is basically a thermostat, intended for mounting in a panel or machine, setting, and forgetting. Once you know the wiring (which is really pretty intuitive: Rd/Bk to power, Yw/Bk to load), it's super-simple to hook up. Note the the output is actually powered - it's not like some similar units that bring out a normally-open relay contact. This means that the load must require the same voltage as the controller (12 volts, in this case). I like that it comes in a case with mounting ears. Again, it's not intended as a front panel instrument, but it's much less hassle to mount this than one of the similarly-priced board-level thermostats, and it looks a lot more professional too. It didn't come with instructions, but the four-line operating instructions on this product listing are enough, or with a bit of rummaging I was able to locate them on the (Turkish!) web site. Basically, you set an "on" setpoint and an "off" setpoint; if the "on" is higher than the "off" then it's an air conditioner thermostat, and if the "off" is higher than the "on, then it's a heater thermostat. Simple. The two setpoints must be at least 2 degrees C apart. (There's no way to set it read F.) I've had no reliability issues with this at all. Once it was set up, it just works. I noted that one of the question answers mentioned a small battery to maintain the setpoints during power outage. This seemed unlikely to me at this price point (I've done electronic product design for a living), so I opened it up, and it appears that the (unlabeled) processor must have some on-board flash or EEPROM, which would make the setpoints completely non-volatile. Certainly I had no problem during my short-duration tests with setpoints being lost when the power was interrupted. All in all, I find this to be a simplistic, but solid and practical, temperature controller at an extremely reasonable price.

This arrived with no issues. There were no markings on what wires (or colors) were for what....It came with no details, just the thermostat switch. I had to use a Chinese language translator to help identify which set of wires was for which part. Other than that, there were no unexpected surprises. The device ONLY uses CELSIUS numbers for the temps, but it's pretty simple to do a conversion. Although it would be much handier if there was a means to select one or the other to remove some of the guess work out of it. (Perhaps there is something if you operate on it - but that would void any warranty for sure) It's been in service for a few months now --- It's connected to a exhaust fan in a large shed which is powered by solar setup. It starts and stops on its own as expected based on the settings I inserted. Note that there IS a draw on the power source....I register about .2amp when it's sitting idle. Although this is a vampire draw, it shouldn't impact a properly setup solar system. I have it coming on when it senses about 80 deg F, and then it will shut off when it drops below 75 deg F. The Thermostat has a TRIGGER (turn on) setting, and a OFF setting. Make sure your OFF setting is low enough not to make it cycle too soon, or it will act like it's never shutting off, and will likely place a strain on not only the electronics, but also what is connected to it. In my case, the cut-off is more for times when the temp in question is fluctuating because it's not getting hot and staying there, rather than once the sun is out full time like past spring when the sun is there all day. At that point, if the temp drops low enough (night time) the exhaust won't run since it won't be needed.

Once you figure out how to set the on and off temps, it worked perfectly Chinese instructions only. Leads are maybe 2” long and wire is hard to strip so plan accordingly.

Powered up just fine, then immediately showed a fault with the temperature sensor. I was only able to determine this because another reviewer scoured the internet for the instructions since this thing didn't come with any.

while researching how to build a fan/temperature sensor I found this unit from Amazon! Discovered it was less expensive than buying the parts to build one , plus it came in a mountable enclosure , with the temperature sensor. All I had to do was connect a 12 volt source, and the fan I wanted to use and placed the temperature sensor on the heat sink of my ham radio and it was ready to keep the radio cool ! Only one draw back and it is not a major one, the readout is in Celsius with no way to change it to Farenheit, not a big deal once you understand the temp range you want to set it for......in Centigrade......and when you get it for the price offered , a complete ready to go unit, this became, for me, a minor detail. unit is in use and working exactly like I wanted! Great buy!

It works , but it’s very hard to understand how to operate it and it seems like you “chase” it around a lot. It’s probably me, but I managed to get it set how I want it , by chance. Price is great so I’m not too upset about it.

Programming instructions: press and hold left to set ON temperature in Celsius. Press and hold right to set OFF temperature. Can be used for heating or cooling. For cooling, the ON temp needs to be higher than OFF. For heating, On needs to be lower than OFF. Remembers settings after power loss. Celsius only, so you need to calculate Fahrenheit to Celsius.

Seems to work as intended.

We are using it to start a ventilation system built from computer fan in an electrical box. We installed it more than 3 months ago and so far so good. I will even order a different one to ventilate another part of the system soon. Must be used with a low power draw equipment due to the size of the cables.

Very happy with this. Used this for an enclosure for my 3D printer and regulates the temperature perfectly. The temperature registers quickly and can change the max and min values within 0.1°C. Also to keep in mind, the output actually puts out the input voltage (doesn’t just function as a relay).

control functions as specified, fair price, temperature sensing probe permits remote operation at about one meter distance, small 0.1 degrees C adjustment resolution, maintains temperature settings when power is disconnected, shows ambient temperature and indicates when load is powered.

Fonctionne à merveille

Works well, easy to set up. So far so good!