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Old 10-26-2010, 12:41 PM   #1
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Default Kegerator Thermal Dynamics

Hey all,

Just got done building a new three faucet kegerator out of a VERY old school fridge. This thing is smaller than a full size but much larger than a mini dorm fridge. One of my neighbors called it a 'trailer fridge'. It sits right at 5 feet tall and 2 feet wide, just enough to fit three cornys and a CO2 tank and not much else. When I got it, I ran it empty to see how well it chilled and it got down to 25F in less than 8 hours. It's one of those old school ones with the freezer compartment integrated into the inside (no separate freezer door) and there is NO fan. It seems to just let the cold air just sink down without any form of air movement.

I put a single corny in there along with the CO2 bottle Sunday night. The corny has four gallons of prechilled (to about 45F) orange soda. Last night it was reading only 45F (after 24 hours) and I know the thermostat was cranked down to the lowest setting and it has been running every time I walked past it. I stuck a small fan in there to see what would happen if the air was moved around. It dropped to 41F.

When I touch the coils on the back, they are pretty hot. You can hold your hand on them for about 7 seconds or so before it becomes too warm to touch.

Maybe the fridge is working as hard as it can? Any advice? Thanks.

My worst recurring nightmare - a power outtage and my lagering fridge gets warms....
dinokath is offline
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Old 10-26-2010, 01:10 PM   #2
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Step 1) Get a small fan inside to circulate air and regulate the temp inside that thing.
Step 2) Get a temp controller to accurately control the temp inside. That will make the fridge cycle when it needs to. If it still runs all the time you might have to get it checked out
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Old 10-26-2010, 06:18 PM   #3
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A fan will help a lot, and make sure the evap lines in the freezer don't ice up. If they do, you're screwed. It won't chill for nuthin!
Originally Posted by Ecnerwal View Post
What does the primary pressure gauge on the tank tell us? That's right, the temperature. Put it on a scale if you want to know how much is in it...
Put some duct tape over the gauge - Or better yet - Replace the high pressure gauge with a plug - High pressure gauges are useless!
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