Quite often when we come across a blocked condenser on a cabinet, after cleaning the condenser or even before, the thing will appear to have lost some gas, i.e. running on balance pressure in in a slight vac. This is mainly on R134a systems. I'm aware that R134a will fine its way out of the smallest of openings, but nearly every time this happens a leak cannot be found anywhere. It's alomost like the gas has been burnt to death due to the blocked condenser and has vanished in a hermetically sealed system! I've heard that R134a burns the shilak off of the motor windings and likes to deposit it up the capillary, hence why we are forever changing blocked capillaries on R134a systems. Has anyone got any thoughts on any of these points? I am really intrigued by these mysteries!!