My 30 year old Fiber Stream
has a 30 year old Instamatic by Magnavox
4 cubic foot, 2 way (110 volt / Propane) refrigerator
. I have both
Donna D's fan inside and Patrick M's fans
on the outside upper vent. I have 2 fans on the outside vent: a smaller .6 amp and a larger 2.4 amp with a double pole double throw switch between to select which one to run.
I keep a thermometer inside the 'fridge on the bottom shelf.
I have conducted an experiment to find out what circumstances keep the interior the coldest for the most time.
2 days before each trip I would turn on the fridge to pre-chill it to 40<sup>o</sup>F. Each time I turned on the fridge, I also turned on the interior fan. I checked the thermometer 3 times for each trip:
The first attempt:
- Before Loading with food
- During the drive about 1/2 way to destination
- The morning after arrival
pre-chill on 110 volts, fridge controls OFF (but left interior fan ON) with 3 frozen Blue Ice blocks in Fridge compartment during travel, fridge on Propane
at destination. The results:
Turned on the small exhaust fan the morning after arrival and the fridge was at 40<sup>o</sup>F that night.
The second attempt:
pre-chill on 110 volts, switch to, and run on Propane during travel
. Turn small exhaust vent fan on at destination
, keep running on Propane. The results:
The third attempt:
pre-chill on Propane, and leave it running. Turn large exhaust vent fan on before departure
, running it during travel. Run both Propane & exhaust vent fan after arrival. The Results:
It appears to me that running the Propane and the exhaust fan during travel have less than the desired effect since the fridge WILL NOT maintain 40<sup>o</sup>F during travel
. I suspect that the wind passing the trailer horizontally
at 55 mph going down the road overpowers any vertical
draft thru the vents on the side of the trailer.