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Home Brew Forums > Home Brewing Beer > DIY Projects > Kegerators & Keezers > Guide to set internal chest freezer thermostat to >32F; Eliminate external control

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Old 06-17-2011, 02:40 PM   #51
Apr 2009
Posts: 189
Liked 7 Times on 4 Posts

Originally Posted by MI_Craig View Post
Was it already cold? I found that you need to turn a couple turns, plug it in, then let it sit about two - three hours to equalize. I'm on day three of adjusting but i think i have it dialed in to where I want.
I'm nervous to let it go too long b/c I've got 3 kegs in there. It was already cold and I couldn't hear a click while I was turning. I assume it still clicks while unplugged?

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Old 06-18-2011, 01:57 AM   #52
Feb 2010
Northern IL
Posts: 53
Liked 5 Times on 4 Posts

Subscribed. Excellent info, AssistantBrewer, thanks for posting.

I often wondered why people didn't just tweak the basic mechanical thermostat. I figured it would take some bending or a shim or some tweaking of something, I had no idea that a built in set screw would do it. Nice.

In a similar vein, for newer models with a thermistor or other sensor, it should be pretty easy to tweak with a series or parallel resistor/pot to shift the operating point.

Can anyone point to a cheap, generic thermostat like this that would be easy to adapt for fermentation chambers or other such apps? Should be cheap on-line for a common part, I would think?


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Old 06-18-2011, 03:27 AM   #53
Feb 2011
firestone, co
Posts: 347
Liked 19 Times on 13 Posts

Yes! You just saved me from buying/building another temp controller.
I had my keezer set at the temp I wanted it at with my temp controller and then disconnected the temp controller, plugged the keezer into the wall and adjusted the screw until the freezer turned on to cool it more. Set at perfect temp the first time! I even get my lid light to work all the time now because it always has power. GENIUS!

Now I can use my temp controller on a fermentation fridge! THANKS!!!

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Old 06-18-2011, 05:35 AM   #54
Flomaster's Avatar
Nov 2010
Orange, Ca
Posts: 2,149
Liked 38 Times on 35 Posts

I am 8-10 FULL turns CLOCKWISE my set screw is all the way in and can't be turned anymore and my temp is at 1.8c right now and the temp is slowing climbing. it went down to -2c when I removed my E-Bay temp controller and let the keezer run on its own power.

all the Keezer compressor just kicked on at 2c with my Large dial in the middle of the road. I can go another half turn to get it dialed in even more.


all systems are a go....I can now use my temp controller on my mini fridge to lager with...YUSSSSS
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Old 06-18-2011, 06:51 AM   #55
ChandlerBang's Avatar
Oct 2010
Posts: 3,044
Liked 26 Times on 24 Posts

Oh hot damn. I even have a chest freezer to try this on.
Originally Posted by D_Struct View Post
I would've made a crayon schematic if I thought this was going to hang people up.

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Old 06-18-2011, 09:38 PM   #56
Pieceman's Avatar
Jun 2011
Charlotte, NC
Posts: 40
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Thank you good sir.

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Old 06-18-2011, 10:10 PM   #57
Jun 2011
Oxnard, CA
Posts: 340
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I can't find a screw on mine, am I looking in the right place? Heres some pics
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Old 06-19-2011, 01:42 AM   #58
drac0's Avatar
Mar 2010
Pensacola, Florida
Posts: 145
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That one looks just like mine. Is your freezer a Fridgidare? I'll have to pull the thermostat out of mine and check it out.
Dragon Scale Brewery

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Old 06-19-2011, 01:48 AM   #59
Jun 2011
Oxnard, CA
Posts: 340
Liked 31 Times on 25 Posts

Mine is a kenmore

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Old 06-19-2011, 12:25 PM   #60
Sep 2010
Cleveland, Ohio
Posts: 36
Liked 1 Times on 1 Posts

I've got the same one

Pull the controller off of the panel by squeezing together the supports that hold it in place.

Now look at the side that was facing the panel. There is a tiny screw, set back in a hole, that is on the opposite side from the cylindrical piece that is attached to the temp probe. I needed a tiny (1/16" flat-head) screwdriver and a bright light to get in there.

Clockwise turns will get it to shut off if it's running. It's all you from there, as you'll need to make adjustments based on when it's turning on and at what temp. So far I've set it too high (~45 F) and too low (low 20's), so I'm getting closer.

Let me know how it turns out.

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