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Old 09-27-2016, 03:32 PM   #1
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Refrigerator Vent Fan

I added a multiple speed 12v fan to my refrigerator vent to try to help improve it's efficiency on hot days. With the fan on low the exhaust dropped from very warm (nearly hot) to ambient air temperature of 95F, improving the recovery time as hoped, and dropping the inside fridge air temp to a comfy 34F. As an experiment I turned the exhaust fan to high and the fridge temp went up to 60F. When I turned the fan back to low the refrigerator temp went back to 34F. Does this make sense? Is the absorption system perhaps sensitive to a temperature delta between the condenser and evaporator?
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Old 09-27-2016, 03:54 PM   #2
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Running on AC or propane?
You possibly cooled the burner tube/heater tube well enough to where it would simply not boil the ammonia.
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Old 09-27-2016, 04:09 PM   #3
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Running on AC.
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Old 09-27-2016, 08:42 PM   #4
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Quote:
Originally Posted by 5picker View Post
You possibly cooled the burner tube/heater tube well enough to where it would simply not boil the ammonia.
However unlikely, that's the only thing I can think of. What kind of air flow does your fan put out and where is it in relation to the burner?
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Old 09-27-2016, 10:00 PM   #5
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The refrigerator has upper/lower side vents with the fans (4) mounted in the upper vent directed out the side vent; the burner is at the lower side vent. The fans are 12v computer case fans and on high put out a pretty good volume.

Thanks for your input. Since low speed works I'll go with that; I was just curious why high speed caused the fridge to stop working at least there is a theory now :-)
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