Very eastyto use holds up well

I bought this model digital thermostat (DT) due to its ability to handle 30amps, instead of the 10amp rating of most other DTs. Reason: my Amana fridge/freezer's starting load (the LRA - locked rotor amps) is 21amps.

The easiest way to wire this DT to control a fridge/freezer is simply to add it in-series with the existing thermostat, then set that component to it's coldest setting. (If the existing thermostat is bad or going bad, then just remove it and wire the DT in its place). To do this, first check the old thermostat located inside the fridge and trace its wires (by color) to the back of the unit, where they are probably located behind a removable cover. WITH THE POWER SUPPLY TURNED OFF OR THE UNIT UNPLUGGED, clip ONE wire from the old thermostat, add extension wires (AWG 18 to 14 gauge) to each cut end, then connect these to the switching contacts on the DT. (By doing this, when you eventually decide to replace your fridge, you can simply unhook these extension wires and the DT, rejoin the two cut cable ends and the appliance is wired back to the way it was).

Leave the temperature probe of the existing thermostat in-place. Find the wiring portal into the rear of the freezer compartment (you will likely have to pull back some putty sealing the portal) and feed the DT's temperature probe through it, then pull it through from the front. Carefully reseat the putty. You might need to add an extension piece to the probe's wires.

After installation, be aware that the DT is measuring the temperature in realtime. Therefore, the digital display will continually fluctuate downward (due to cold air currents inside the freezer), as the temperature drops. The reading will continue to fluctuate once cooling stops and the freezer starts to warm back up to your differential temperature setting. (You'll probably want to get an accurate conventional fridge thermometer and use its readings to tweak the settings of the DT).

The real-time and accurate readings from these DTs will really make you aware of what's going on inside your freezer. With older appliances (weaker compressors, worn door seals, etc.), be realistic about the temperature you are trying to achieve, as that can make a big difference to the cooling cycles ... and your electricity bill. For my 20yo Amana, setting freezer cooling to 5 degrees and the differential to 10 degrees (i.e. warm up to 15 degrees) works very well.

I use a very crude but effective means of monitoring the ACTUAL operation/cycling of my fridge/freezer, over a period of time ... I simply locate a digital voice recorder behind the unit and let it record the compressor's operation for a few hours; even overnight. Then, using any audio editing program/app, the audio visualization and time marks will show you the exact ON-OFF-ON-OFF cycle times.

Super easy to install, performs as advertised.

Must tie in to neutral on 4 terminal if using "same power supply for load"

Seems to be very accurate works perfectly a little tip that you when you are programming yours when you are setting the start stop temp I'm using mine for cooling so the stop or off temp has to be set and you get the start or on temp by adjusting the differential so if you want to start at 70 and stop at 75 the d setting is 5 good luck hope this helps