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Home Brew Forums > Home Brewing Beer > DIY Projects > Fermenters > ebay aquarium temp controller build
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Old 11-20-2012, 07:02 PM   #3151
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Keeping my old school over/under fridge at 40F the freezer stays around 20F.

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Old 11-20-2012, 07:39 PM   #3152
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40F isn't very far from the normal operating temp for a fridge, so at that temp the freezer is probably operating normally.

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Old 11-20-2012, 09:07 PM   #3153
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Right, and operating at ale temps, in the 60's, your freezer is gonna be around 40, which aint gonna fly unless you're only trying to refrigerate something, not freeze it.

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Old 11-20-2012, 09:14 PM   #3154
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Right, and operating at ale temps, in the 60's, your freezer is gonna be around 40, which aint gonna fly unless you're only trying to refrigerate something, not freeze it.
Sorry, I was on another path. I ferment in mini fridges. My full size is kegerator/hop storage.
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Old 11-20-2012, 09:16 PM   #3155
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Sorry, I was on another path. I ferment in mini fridges. My full size is kegerator/hop storage.
Yeah, My keg fridge has a real touchy thermostat, will freeze if you didn't open it for a week or two, but will thaw if you bump it up any. I should hook it to an STC, but I don't. My ferm fridge is an old Frigidaire, pretty small, maybe 16cu ft, but big enough for two ale pails or my 14g fermenter, either way a fan also fits.
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Old 11-20-2012, 09:32 PM   #3156
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The freezer temp will depend on the relationship between the ambient temp and the set temp of the fridge compartment. I keep my ferm fridge at 64F pretty much year round, and the freezer gets down to low 30's when ambient temps are higher, and is only a few degrees cooler than the fridge compartment when ambient temps are lower.

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Old 11-20-2012, 10:19 PM   #3157
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The freezer temp will depend on the relationship between the ambient temp and the set temp of the fridge compartment. I keep my ferm fridge at 64F pretty much year round, and the freezer gets down to low 30's when ambient temps are higher, and is only a few degrees cooler than the fridge compartment when ambient temps are lower.
Yours is completely opposite of mine, then. My freezer on ferm chamber is about 20* cooler than the fridge, due to more concentrated cooling in a smaller area. Of course, there is no fan, it's an old metal box-type freezer (has it's own door, like a normal freezer, but it's just metal-lined compartment with no fan)
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Old 11-20-2012, 10:46 PM   #3158
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Yours is completely opposite of mine, then. My freezer on ferm chamber is about 20* cooler than the fridge, due to more concentrated cooling in a smaller area. Of course, there is no fan, it's an old metal box-type freezer (has it's own door, like a normal freezer, but it's just metal-lined compartment with no fan)
Not sure how that's opposite of mine. Every fridge design will behave slightly differently, but they'll all still follow the trend I outlined. Think about it this way, the closer the ambient temp is to the ferm temp, the less the cooling will turn on, and the more time the two temps will have to equalize with each other. When the ambient temps equal the ferm temp, the cooling will never come on, and the temp will eventually be the same in both compartments.
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Old 11-20-2012, 10:51 PM   #3159
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Nevermind. I see what you mean. Warmer=more cooling running, cooler means doesn't come on. Gotcha.

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Old 11-21-2012, 02:21 AM   #3160
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Your best bet, I believe is to keep you eyes open for a second hand modern full size fridge without freezer. You can make the excuse to your wife that it can be used for food and drinks for dinner parties.

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