Cold box / work table construction

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mainshipfred

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Hi all,
The CoolBot is a great innovation, but too expensive ($350).
If cost is not an issue, go for it, but here is a much cheaper solution you may want to consider:
Since most AC unit temperature sensors are thermistors you can simply change the value and fool the controller so that the temperature range is shifted downwards.
I did this for a portable room AC unit I'm currently using in my wine cellar.
The thermister is a 10K and I connected a 100K resister in parallel.
This trick brought down the minimum temperature setting from 62F to around 53F,
This works for me.
All I do is remove the sensor from the coil and re-position it to the outside of the unit. Pretty much does the same thing.
 

ibglowin

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My GE unit pictured above stopped cooling properly a few years back. I googled the problem and cleaned the filter and sensor inside the unit. I saw that people were pulling the sensor and removing it from inside the unit and repositioning it to outside the unit and did just that. It cools the winery down another degree or two this way.
 

mainshipfred

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My GE unit pictured above stopped cooling properly a few years back. I googled the problem and cleaned the filter and sensor inside the unit. I saw that people were pulling the sensor and removing it from inside the unit and repositioning it to outside the unit and did just that. It cools the winery down another degree or two this way.
With mine I re-located it through the wall to outside of the cooler. With the Inkbird I have it set to 55. Haven't tried to get it any cooler.
 

mainshipfred

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I see, so you're just letting the unit work with it's own controls. If you would get an Inkbird and put that sensor outside the room you could get it even cooler. That is if you care to.
 

ibglowin

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Yes, Its cooling to 64F actual room temp now. I am pretty happy with that! My winter temps from ~October to ~April or so are ~55F in there so I am not worrying about a few months of ~64F.
 

Boatboy24

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Yea I added 12" attic blanket above the winery and its freezing in there in the summer time. We only have a couple months of heavy use then several months of light use then basically 6 months of no use so happy with the simplicity for sure.
You do anything about humidity, or just let it be what it will be?
 

ibglowin

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No, assuming you mean lack of humidity where I live. Its 51% in there right now since we have monsoons going. Even when its really dry in May, June it ~30% in the winery. I have pulled many of my Lafitte 1+1 corks from as far back as 2011 and they are not brittle or crumbling at all. I have had some older commercial ($$) wines that were closed with 2" pure cork that broke when using my big stand opener. The wine was fine the cork just broke in two when it pulled it out. I use an "ah so" opener on those now (when I can remember) and that pulls them out perfectly. Much more gentle process of removal.
 

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