A bit of info that might help someone. I have been investigating an intermittant vibration from the fridge in our 2 year old Globecar PVC. I was surprised how much dust had accumulated. We have had 112 nights in the van. I had to bodge up a small pipe on the vacuum to clear the exchanger out. See before and after pics below.
I hadn't noticed a drop off in performance, but I hadn't been measuring anything carefully.
I hadn't noticed a drop off in performance, but I hadn't been measuring anything carefully.