Any ideas on the best Norcold fridge service in Vancouver BC

The fan was probably running because the battery was being charged after being off grid. If the battery was discharged significantly, the fridge may have just stopped working.

On propane, biggest culprit is usually a clogged burner or flue. The flue just needs to get blown out with pressurized air to clean out any soot buildup. The burner is easy to check by opening the little inspection cover and examine to make sure the flame is pure blue, no yellow.