absorption refrigerator out of level, boiler temp control

Once you have ANY blockage small or large or complete, Burping the refer(removing and standing on its side or top for 24 hours and then reinstalling,DOES NOT FIX THE CONDITION. It will allow some cooling a little better than before burping, but the problem is still there and after a few days/weeks the original blockage problem will diminish cooling. As I stated, the blockage is as hard as a weld and the cooling unit tube at the top must be cut off and a new upper tube welded in place and then recharge. Doug