Hello CJ. I would respectfully suggest that you go to Amazon and purchase
station. Yes -- for your refrigerator
. Mine is by Ambient Weather
(brand) and was about $25. What's great about it is (in addition to the barometer, atomic time, et al) is there is a remote
outdoor sensor. I put that inside
my refrigerator away from the freezer section.
displays both temperature and humidity (mine removes humidity first, then the temp goes down) -- and with it you'll be able to check how cold things are inside the reefer. I went into a dock
for a couple days and have determined Setting 3 (1 thru 7 on dial) is the right balance between too warm and too cold for my $70 a/c powered Haier from Walmart.
Would I like an Engle? Sure... but it's out of my price
range and this works. I suspect the Ambient Weather station would help you insure the inside is keeping cool enough.
Aside: I bought an Accurite weather station ($20 or so) and could not see the doggone numbers unless right exactly in front of the thing.. Make sure the numbers show up -- much to my chagrin I discovered they are not all the same.
Good luck, and happy cruising.