DZS ElecTemperature Controller -50 to 110 Celsius (-58 to 230 F) DC 12V Programmable Heating/Cooling Thermostat Control Switch Module NTC Waterproof Sensor Probe Dual Color LED Display Monitor

Read through reviews and there are so many reviews about it simply not working straight out of the box. Unfortunately, based on what a lot of the reviews say, that's probably more to do with user error than the unit itself. The wiring isn't exactly intuitive and if you don't read the instructions you're going to have a bad time with a seemingly broken unit. You can even see the wiring diagram in the product listing pictures.Before giving up on the unit make sure you wire it properly according to the instructionsOnly time will tell how long this lasts but right now it's a great little temperature controller.

I bought this to use to run a fan to keep my solar controller bay in the RV cool. It works great. I attached a fan to the "load" side and purchased a dedicated on/off switch. I programmed it so that the fan would turn on in the solar controller bay when the temperature reached 33C. Works great! There are 2 setups for attaching a load. One looked simpler than the other, but wouldn't work for me. I had to use the first setup.

Using this to control a cooling fan on a 2 way radio repeater system. Works great.

I installed this temperature controller inside my self built home generator to monitor and switch a heavy velocity radiator fan 10 amps 12 volts on, to control heat buildup. It preformed perfectly as described.This controller held up for 4 months average to 6.7 hours at different times generator was needed and during a couple test runs.The last time I test run the generator, it failed to come on during engine run time.I assume this device is the same as the digital RPM display I purchased and went through 3 of them one right after the other. I discovered that although the manual claims to operate on 12 volts. That maybe true under certain conditions. The temperature controller states that it will function up to 14 volts.In order to correct the failure I had to install a 9 volt regulator in line with the RPM counter and a 12 volt regulator for the temperature controller. Both regulators have over voltage protection so if the regulators are damaged due to over voltage they shut down.I strongly recommend voltage regulators on devices that are installed where an alternate charging system provides power to keep battery charged.Other than this issue Ive ordered 2 more of the temperature controllers and 2 of the RPM counters for spares. If they continue to fail, I will have no other option but to find another product that will preform and last.

I installed mine on batter hungry thermoelectric cooler and it kept it from draining my battery dead yet keep the food in an optimum temperature range.Easy to hook up but had to improvise where I installed it behind the plastic.It would have taken a lot of work to make ot look professional but it was satisfactory for my personal needs.