Your fridge will take at least 4 hrs to cool down. Freezer section has to cool down first then food section will cool down.
Fridge needs to be 'reasonably level' to operate properly.
Off level operation will damage it....damage is accumulative and permanent.
The thermistor on the RM1350 is on left side in a fixed bracket.
Temperature is controlled via temp setting on upper panel
When initially cooling fridge......run it at MAX temp setting then when food section gets down to 40*F adjust temp setting downward.