It was somewhere outside Barstow when "Harry Bloomfield"
wrote:

For example.... Caravan fridges are often running and in use whilst
being transported. These types of fridges work on exactly the same
principle as domestic fridges, they are just just smaller.

They're not the same principle. Caravan fridges use heat (gas or
electric) to power them, not a compressor. There's no compressor
lubricating oil in the circuit, so there's nothing to disturb.
--
Smert' spamionam