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Johnson Controls Refrigerator Thermostat


SKU# 7051

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External overriding thermostat with analog control and preset differential.


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Johnson Controls Refrigerator Thermostat

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  • Johnson Controls Refrigerator Thermostat


Product Details

Lager year round with this external overriding thermostat. It installs on a fridge or freezer to maintain optimal fermentation temperature—trying to lager in a fridge without an external overriding thermostat results in temperatures that are too cold for yeast or even in frozen beer. Plug the appliance of your choice into the thermostat, then plug the thermostat into a standard 120V outlet. An analog dial lets you set the setpoint temperature between 30 and 80°F, with 1 degree increments. The Johnson Control thermostat has a 3 1/2 degree differential, which means that the thermostat will shut the fridge or freezer off (stop cooling) at 3 1/2 deg below the setpoint and start the unit (resume cooling) once internal air temperature exceeds the setpoint—the effect of this fluctuation on the actual temperature of fermeting wort or beer will be insignificant.

Additional Information
Support Documents:No
3.8 / 5.0
21 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Can’t go wrong!!
Fantastic temp control ! Quality product! When I’m not fermenting I can crank the ice maker down to have 28 deg beer outside!!??
March 1, 2018
2 months ago
Lagering the lager
The temperature controller is perfectly accurate and my first lager is underway. Rock on!
January 19, 2016
Johnson Controls Refrigerator Thermostat for a Keezer
Works great! Nothing fancy... but sure does keep my beer right around 43? F. Easy setup to attach to a GE 5 cu. ft freezer and regulate the temp above the normal setting of a chest freezer. Chilled soda water a beer on tap = awesome.
November 9, 2015
Works as advertised
Easy set up, keeps the beer at fermentation temps no problem. Saves me money over the digital one, which of course equals more money for brewing beer!
October 14, 2013
Works like it should!
Been using this product for over a year with ales and lagers. (approx. 10+ batches) It works very well! Mine has a swing in air temp of 7-8 degrees which means that the target temp for fermentation is within 1 degree F. That is VERY consistent and will not affect the beer. This is a great product and I highly recommend it.
August 19, 2013
ok unit but get the digital one
It works, I have two, but one just became so rusty and corroded after 1.5 years, it just stopped working.
July 8, 2013
Started off strong.
This product started off doing everything it says in the description but now after just over a year of using this product it is swinging at least 10 degrees if not more. I had it set at 64 and found it at 58 then checked later that day and found it at 70. It seems to be running more on the cold side, I see it in the high 50's or at 60 more than above so my fermentation is at a crawl. I raised the temp to 68 to see if it is just a little our of calibration and now it is at 70 more than anything when I check it. At least my beer has some small krausen on it. If I could go back in time I would spend the extra money and upgrade to the digital. Hopefully it lasts longer than this one.
July 7, 2013
Good but not Great.
I've been using this unit with a chest cooler for 3 years with good results. While somewhat tricky to set the temp because the scale on the unit doesn't match how cold it actually keeps the cooler once it is calibrated it does pretty well. Temp swing about 10 degrees but because of beer the temp variation is not important. If I had it to do over I would have spent the extra few dollars to by the digital unit.
March 9, 2012
fair unit but short life span
Bought this 16 months ago and it has just now decided to stop working. Now my keezer is subject to the temperature of the garage.
March 8, 2012
Has worked for years
Mine has worked for years w/o a problem. Other reviewers have correctly commented that the temperature swings in the air are much greater than the swings in the beer temp because of the huge difference in thermal mass. One way to reduce the air temperature swings (if you are using a conventional fridge) is to put a couple water-filled milk cartons in the freezer section to increase the thermal mass in the section where the cooling is taking place. I am sure the digital version is a fine product but I wonder if it uses digital filtering to smooth out the temperature swings on the display. Thermodynamics obey the same laws of physics whether the controller is digital or analog, so as long as the fridge motor is cycling at the same rate, your beer temp history will be the same.
December 14, 2011
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Browse 4 questions Browse 4 questions and 17 answers
Is the probe water proof? Was thinkinking about placing it in the fermenter .
A shopper on Jun 8, 2017
BEST ANSWER: It is a sealed thermo coupling probe. I would think is totally water proof. If placed in liquid with a direct transfer of temperature, rather than ambient air just floating around it, there may be a few degrees of temp difference. This can be adjusted by monitoring the temperatures with regular thermometers and adjust the Johnson accordingly.
I hope this helps.
if i use this on a fridge with upper freezer will the stuff in the freezer stay frozen or will it be the same temp as fridge?
J K on Aug 12, 2016
BEST ANSWER: The upper freezer won't stay frozen, it will only turn on when the lower fridge does.
Can I use this to set a stand-alone freezer at 50 degrees or is there anything else I would need to do to the freezer to get it to operate that way?
A shopper on Feb 23, 2017
BEST ANSWER: This is how I am using the Johnson thermostat I bought. I converted a freezer to a cooler. No other equipment needed. The control has a temp probe that you place inside the "freezer" interior and select your cut / set point temperature on the control itself. The unit basically acts like a switch, turn on and off the power to the freezer to maintain the set temperature. My control keeps my "cooler" at a stead 38 degrees for my home brew. I have also used this cooler a a lagering box with steady temperatures in the upper 40s to mid 50 degree range as desired.
In the brewing room I am building I need to be able to turn a heater on when the temperature drops below the setpoint and turn on a cooler when the temperature goes above the setpoint. Can these Johnson controls be made to do either, say if I had one for each function?
S P on Mar 23, 2016
BEST ANSWER: This controller can do either function but not simultaneously. It comes configured for cooling but it can easily be modified for heating. Unplug the controller from power. Remove the cover (one screw). Move the black wire from the outside terminal (#2) to the center terminal (#3). Replace the cover, plug it in, and you are good for heating.

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