WWZMDiB 12v Thermostat Switch with Waterproof Probe 10A 120W -50℃ to 110℃ 12v Temperature Controller(3pcs)

Arrived quickly, only needed one but three costs little more than one so nice to have spares. Easy to incorporate and set up, using it for an exhaust fan to cool the electrical panel compartment on my boat, works well.

Build extremely cheap but so far reliable. It saves the high/low limits between power cycles.

I purchased this product to help regulate my dometic refrigerator. It's the old school refrigerators that utilize ammonia to keep them cool. The freezer works like a charm however the fridge can be a pain in everyone's butt. I attached 12 volt hotline inside the fridge to this unit and it worked like a charm. build quality sucks as it's just a circuit board in a lot of plastic. It completely fell apart when I was stripping one of the wires 😂. Besides that it works well and it's very sensitive the temperature change. My dometic went from 50° c down to 17 within 3 minutes!! The Price is Right for this unit and if it wasn't for the build quality it would be five stars all the way home.

The program instructions are slightly confusing, but actually it couldn’t be simpler. The left button is the “on” temperature, and the right is the “off” temperature. Press the button until it flashes, then adjust up or down to the desired temperature. On can be higher or lower then the off, or visa versa, what ever you desire. It only displays in Centigrade which is a pain, but each degree is divided in tenths, so you can fine tune it in very small increments as needed. It shows the present temperature of the probe. A quick press of the left button shows the start temperature setting and a quick press of the right button shows the off setting and automatically returns to the actual probe temperature. I use them for tiny computer fans to help cool my solar charge controllers.

If you're trying to use this to turn on cooling fans, don't.If you have the high limit for the turn on temp, the unit will not turn on if the temp goes above the high limit and won't turn back on until it has dropped below the 120°c.

I bought these switches to convert a Buddy heater to a thermostat operation and they work great! Great price for these 12 volt thermostats.

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Functional but cheap in every respect. Feels flimsy, uses 24g wire with super-thick garbage-tier insulation. Don't expect to use this to control an actual heater of any sort without a FET or SSR to get the current delivered. Accuracy was specified as .2°C and I saw variances of about 3-5° on all three units, measured with a precision thermocouple.