2PCS Temperature Controller Module with Case, XH W1209 LED Display Digital Thermostat Module with Waterproof NTC Probe -50~110℃ Electronic Temperature Temp Control Module Switch

I used this product to control a silicone windshield wiper heater strip rated at 50w 4.2amps. The other one will be used to control a 12v cpu fan to provide air circulation inside a 12v portable freezer/refrigerator. Instructions were bad as usual but I finally figured out the settings. One of the acrylic cases arrived with broken parts. These have very small nuts and screws and assembly will take good eyesight. Recommend using a dab of hot glue or Elmer’s glue on each nut once you get it put together to keep them from falling off and rolling under the refrigerator. The 4 power block terminals are very small gauge and the screw heads which grip the wires are very soft metal. Solid core bell wire fit nicely but stranded wire is almost impossible to use unless you just solder it to the terminals. Overall it was a pain to get them put together and do what I wanted them to do but they work and the two pack with cases is a good value. If the people who sold me this item read this review, you owe me a case.

I have some older firmware versions of this thermostat (settings only go from P0-P6) and the P5 setting (delay start) only works once when the power is applied to the thermostat but no delays afterward.In this order, I received the newer firmware (settings go from P0-P8). The delay start setting works repeatedly this time. However, the P5 setting appears to be in seconds (not minutes). I can set the P5 delay start value from 0 to 600 seconds. The delay start feature appears to work in both heating and cooling modes (set by P0).In my application, I'm controlling a compressor type refrigerator. When the compressor is turned off, it must rest for a minimum time before it can be re-started. The delay time (setting P5, now in units of seconds) ensures the minimum compressor rest time.I like the included case with these thermostats. Now that I know the delay start time works, I will definitely be buying more of these thermostats.

They work great once you figure out how to wire and program them. No instructions came with them.

It was clear from the specs on Amazon that the controller operating voltage was 12 volts, but I was counting on using the thermostat to interrupt 110VAC so that I could use a 110VAC hot plate to maintain a temperature of 110F in a container. There was no information about the switched voltage, so I assumed it could switch 110VAC. From the hook-up suggestions that came with the unit, it appears that the input voltage and the switched voltage are both 12VDC. This is not going to do me much good. I am going to try to use the thermostat to switch the hot plate voltage. Maybe it will work. If it does, I will revise this rating. Still, accurate and complete specs should have been provided.

I use these on many little projects that require a thermostat. Easy to wire, extremely low idle draw. Easy to adjust. Great for the money!

Okay, you get 2 circuit boards with no documentation and if you're like me you didn't read the fine print and you're going to have to deal with degrees C. Whatever. It's a good price and it works. Plug in the thermistor, and power it up with 12vdc (that's labeled at least). The display is pretty bright and mine was set at 50C (122F, that's a hot set point). Hit the set button, then tap the - button about a million times to get it down to 30C, or something reasonable, and hit set again to save that setting. Now, assuming your room is below 30C (sorry for you if not) then grab the thermistor and watch it sail up to 30, 31, ahh 31.7 then click, the red led comes on and the relay closes. K0 and K1 are floating - they are not tied to anything, so it's just a set of contacts that closes. I figured they would be tied to the 12 vdc supply, but no. Not a big deal, just a couple of jumpers and we're in business. Anyway, would a schematic and some basic instrutions been too much to ask for?

Works good, no instructions included.

This unit comes programmed for cooling. If you don't spend 20 minutes finding instructions on how to change it to heating mode, you could easily think that Heating is not an option. Thankfully you CAN change the programming to heating instead of cooling. Press and hold the set button for 3 seconds. P0 should show on the upper display, with C on the bottom display. Press the set button again for C to start flashing. Press the + button to change the C to H. let it flash for 5 seconds or so, and it will save and exit programming mode. It should now be set for heating!Unit has been working as designed. I have it controlling my home-made food dehydrator.