Jonson Controls A19AAT-2C Freezer Temperature Controller (D132)

Still working after 12 years. The best way to make a standup freezer a temp controlled wine storage.

Excellent quality and really holds to the temp I have at once I dialed it in. Love my new fridge that is a freezer running as a fridge using the controller. Mechanical rather than digital is much better and reliable.

Works great. Good way to turn a deep freeze into a refrigerator.

I purchased this item so that the small freezer in my basement could be converted to a fridge for aging barleywine ale. I had been keeping this beer in my basement on a shelf and the temps had been nice most of the summer for aging. However as the fall starts to roll in, the furnace will be kicking in within the next several weeks and while my "man cave" basement will be nice, cozy, and comfy for watching movies and playing video games, it will be much too high for aging my favorite barleywine ales. The installation was simple...no drilling or clumsy screws to deal with. I've set my thermostat to an alcohol-comfortable aging temp of about 48 degrees, easy to do with this device. My freezer has become my new man-cave fridge with several bottles of barleywine waiting to be opened over the next several years. The thermostat regulates the temperature keeping it constant, turning the freezer on and off periodically. I couldn't be happier with this solution as it turned my freezer from what had been a large box taking up space without much frozen food in it to a valuable and useful beer aging fridge. The cost was also at least $50 cheaper than if I had gone ahead and bought a small fridge for this purpose plus I didn't have to worry about finding space for a new fridge. One of my best purchases of any kind this year.

I have collected three or four of these units over the years to control a chest freezer and mini fridges for beer making/serving. The latest such unit, I purchased from an Amazon seller. I will say I was surprised by the accuracy of the dial on the most recent unit I bought. My others do not control the temperature to the same level indicated on the dial, so I simply keep a thermometer inside the appliance and adjust accordingly. I know you can buy digital controllers for a little more money, but in my mind it feels like analog will be more durable -- that a digital model could fail more quickly. I could be completely making that up. This controller comes with a rather long power cord that may be longer than you need. At any rate, the power cord to the appliance itself will need to be the same length since it plugs into the controller's plug end. The temperature probe is attached to a long metal capillary tube. At 6 feet, it's plenty longer than I ever need; the excess stays coiled up. The tube is malleable and you can kind of bend it to take whatever configuration you need.

I bought this temp controller to turn a mini-fridge into a cheese cave to age hard cheeses for months at a time. The temp needs to be between 50-54 degrees for this and the Johnson Control works perfectly. It was holding a steady temp after less than 24 hrs. I put the probe in a jar of water in the fridge to insure a stable temp and it works like a charm. Easy to set up - just plug the controller into an electric socket, plug the fridge plug into the controller socket, put the probe in the fridge, set the fridge temp to its coldest setting, set the temp on the controller to what you want and voila! Great device at a reasonable price.

I bought 2 of these to turn some Frigidaire (FGCH25M8LW) chest freezers into refrigerators. It looked simple enough and I could not find any real evidence to suggest that this thermostat shutting off the power to the compressor was going to harm the life span of the freezer. The one thing that I didn't do correctly (that in hindsight was fairly obvious) was that initially I left the gas filled sensor inside the freezer and ran the remaining 6 feet of copper tubing outside the freezer to the controller. I realized that was probably dumb as it would leave a significant surface area exposed to the outside temp that could skew the thermostat settings. OK, simple enough to fix. I just coiled the copper tubing back up, secured it to the inside of the freezer and mounted the controller to the outside leaving only a few inches of exposed copper which I insulated. Overkill? Maybe, but for that absurdly difficult change it's no longer a problem to with which to concern myself. So if you are looking at one of these to make a freezer into a fridge, it was simple and so far (2 months as of this review) it's worked without any fiddling needed. I'm happy. Unrelated to the actual product but related to its use. I have had a freezer and "converted" fridge running though Kill-a-Watt meters for about a month. The Frigidaire freezer takes about 45 watts per hour to run at the factory set freezer temp. The modded fridge is set with the Johnson controller to 38˚F and run about 15 watts per hour.

Very easy to install. Use to convert freezer to frigde

Instructions for set up not clear as to what ‘set point’ was or to which part (dial or setpoint screw on slide) was the low/high temperature setting. Trial and error used to set. We used this device to turn a freezer into a fridge. Works like a charm!

This is an excellent solution for those who are on solar. I leave mine plugged in all season and it keeps beverages ice cold using very little electricity.

Great product, does exactly what it is designed to do! Controls my 5cuft freezer at desired refrigerator temperature for off grid cabin use.

Worked really well all last summer for keeping vegetables fresh for market.