[Tilted Irish Kilt]

fella :" Travel trailers have refrigerators that run off of propane and they can make ice."

Quite true, and a good call for camping supply and travel traiers !
Combination Refrigerator and freezer thermometers can be had for $4 - $5, although quality standards allow for a 5 degree of error.
Bacteria multiplies once the refrig gets warmer than 41 Degrees Fahrenheit or cooler than 140 degrees.(danger zone is 40 F through 140 F).
Rotisserie chicken are generally cooked to 180 F, and should be time and date stamped on the package-generally on the price tag.
Cold air sinks and hot air rises, so the cooler temps in the refrigerator will always be on the bottom, so where you place the thermometer matters to the temp reading.
Coldest and best refridg/or freezer is a top opened appliance.

[fella]

Did you check out my link to the Amish made refrigerators and freezers?