Johnson Controls A19AAT-2C Freezer Temperature Controller


Customer Rating :
Rating: 4.6

List Price : Price : $48.70
Johnson Controls A19AAT-2C Freezer Temperature Controller

Product Description

Use this handy controller to regulate the temperature in your freezer between 20 - 80F . Great for turning a chest freezer into a keg refrigerator. Strictly a mechanical thermostat for cooling only, it is simple to use and economical. It operates with a gas filled probe on a 6-foot capillary tube. When the gas contracts or expands in the probe, it triggers a mechanical device inside the control which turns the power on or off. There is no probe temperature readout on the dial, so keeping a thermometer inside the refrigerator is highly recommended to keep track of the actual temperature. On most refrigerators, the controller will allow a usable range of 37 to 80 F, while on freezers, the controller will be able to reach its full 20 to 80 F range. *Keep in mind that if you use it to control a refrigerator, you will lose the use of the freezer compartment for food storage, as it will not stay cold enough for safe frozen food storage. In stock and ready to ship. Features: Made of stainless steel. Adjustable with the turn of a knob. No drilling necessary. Plug unit into wall and then run the sensor into your freezer. Male and female plug in one. Specs: Temperature dimensions: 4 3/8"H x 2 1/8"W x 1 1/2"D. Cord dimensions: 6'. Remote sensor bulb: 5 1/2"W. Remote sensor bulb capillary tube: 6'. Temperature range: 20 - 80F. Voltage: 120 VAC. . . Includes: Chain hanger kit. Instructions.


  • Great for turning a chest freezer into a keg refrigerator.
  • Easy to set up and use.
  • Plug unit into wall and then run the sensor into your freezer.
  • Temperature range: 20 - 80F.
  • Easy to adjust with a quick turn of the dial.


Johnson Controls A19AAT-2C Freezer Temperature Controller Reviews


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19 of 19 people found the following review helpful
5.0 out of 5 stars Great for chest freezer to kegerator conversion, March 7, 2011
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This review is from: Johnson Controls A19AAT-2C Freezer Temperature Controller
Since my chest freezer dials only allowed for temperatures of freezing and below, or 50 and above, I had no way of keeping my kegs cold enough to where I like my beer (35-40 degrees).
But this device has been outstanding. To limit the frequency of which it turns on, I placed the thermometer in a glass/bottle of water. That way, when the liquid gets to cold, that's when the thermostat kicks in and turns the freezer back on until the liquid is at the desired temp. Also saves the compressor so it's not kicking on as much.
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7 of 7 people found the following review helpful
5.0 out of 5 stars Off Grid Chest Freezer to Refrigerator Conversion, November 26, 2011
By 
Wretha Smith (Texas, United States) - See all my reviews
Amazon Verified Purchase( What's this?)
This review is from: Johnson Controls A19AAT-2C Freezer Temperature Controller
This works!
My hubby and I live 100% off grid, we are using a small solar system, we needed a way to refrigerate our food without draining the battery bank (or our financial bank), in the beginning we simply used a small dorm sized cube refrigerator but that used a lot of power, we didn't use it very often.

I learned about converting a chest type freezer into a refrigerator using an external thermometer and decided to give it a try. We purchased this external thermometer here on Amazon (it's one of the cheapest prices I've found), we already had a small chest type freezer, we hooked it up and in the beginning it ran quite a bit, but once it got down to the temp I set, it shut off and now only runs about a couple of minutes an hour.

The way it works is simple, this is an external thermometer, you place the probe (that copper colored thing) into the freezer box, I placed mine about a foot from the bottom. Next you plug the freezer into the external... Read more
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6 of 6 people found the following review helpful
5.0 out of 5 stars Thermostat Control for Brewing, May 6, 2010
This review is from: Johnson Controls A19AAT-2C Freezer Temperature Controller
Very easy to install - takes only about a minute to set it up. When measuring with a separate, digital thermometer, I concluded the unit is accurate to within 2 degrees Fahrenheit...or perhaps my digital thermometer is slightly off. Regardless, it works great - definitely recommend it for converting old fridges into a kegerator or for use in fermenting homebrew at a specific temp.
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