Got the fridge out to clean it up (first time I have removed it) the
fridge runs fine on 12v and 110, have never got it going on LP. Anyhow,
since I have it out I want to dial it in.  Have a copy of the service
manual. My question is regarding the "air pump". I removed the little
plastic hose that connects the air pump to a hard line. The pump itself
blows air out but when I put my mouth and try to blow into the tube it's
completely restricted. I'm assuming this is not normal. Should I try and
crank some compressed air down the tube or is there something else to
do. I couldn't find any reference to this particular problem in my
exhaustive search attempts. Thanks!