It looks like my fan switch to turn on the fan behind the refrigerator to push air in passed the coils and out the upper vent. In my '24 they installed a small desktop computer fan to push the air passed the coils. I think my small fan burned out. However you have to pull out the frig to get to the fan which means opening the propane line which may open Pandora's box. So I just use a small clamp on fan during hot summer days to help vent the cooling air passed the hot coils.

Lloyd, On my 24' Classic that fan was accessible thru the upper vent (1000 screws seems like). It's sealed with butyl tape when re-installing. I did what is call the "Sushidog Mod", which is removing that Matel toy fan with two or even three computer fans wired together, and still controlled by the thermostat. These up to date fans last 1,000's of hours and draw VERY little amps as well as turn faster. I'm sure you could find the posts in the "search" heading. I've installed this mod in three Hi Los with great success.
Tree

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Treeclimber
2703 Tow Lite
2002 Escalade
Bonita Springs, Fl. &
Andrews, NC

On mine also the water pump switch is there ..no fan switch

the switch is for a cooling fan in rear of refrigerator, if it gets to hot or no air flow it will come on to circulate air.