There might be a possibility that "burping" a westy fridge could be
damaging.
After years of use, small particles ( like scale, corrosion, etc.)
might collect at the bottom.
That would be the boiler, I guess.
If one turns the fridge upside down "burping" it, those particles
become shaken up, and could create a blockage on their way
back down.
That is what sometimes kills the big refrigerators if one transports
them on their side.
Anyway that is what I have been told by some specialist.

Harald
90 westfalia.