Refrigerator Fan Noise

If your fridge is in a slide or in diagonally situated in the kitchen (hence no roof top vent) , your fridge is equipped with a fan located above the burner outside to help move hot air out the upper exhaust vent on the sidewall of the camper. The fan is set to kick on at a certain temp (I have read 90) and is more apt to run when hot out or when the sun faces the fridge side of rv.
I have one of these fans and yes it is loud, but I got used to it. I have read about owners switching out the fan for a quieter PC fan