Have another person repeatedly push the switch and you listen to where the solenoid is clicking.
Its usually near the house batteries in a protected area out of the weather. It might be behind a plate with screws. A wire may be loose from bouncing down the road not allowing the house bank to fire up the starter.
You might also have a BIM that might be bad. Don’t worry, a BIM is not a medical condition , its a Battery Isolation Manager. Sometimes looks like a black box the size of a pack of cigarette's located near that emergency solenoid. If you don’t have a BIM you can add one.
Its the brain the directs current between the batteries. Some brands are junk others are better. If you have one , it should be wired to control the charging of the house and vehicle batteries be it while driving, parked while plugged into shore power or generator. The BIM flip flops the current between the batteries to reduce the load from the alternator.
If you add a solar panel, that will also keep all batteries charged through the BIM while parked. Hopefully then, you’ll never need that emergency switch bc your batteries should stay charged if you have solar. You only need one panel to keep it all topped off. I use a single 100w panel for 3 sometimes 4 grp 27’s.
Fridge should be ok. I have done the same a lot more often than 2x for 20 mins. An NR model too. Turn it on for 8 hrs with a thermometer inside. See if it reaches a satisfiable temp in the fridge and freezer.
The gas must flow thru the fridge tubes. When parked off level the gas can crystalize inside the tubes eventually building up causing a blockage. Over time bc of off level use, the fridge will not run as cold as when new.
