I've got a 1997 Mercury Mountaineer 5.0, and I've been searching for days on how to clean the evaporator core without having to discharge the system. I've read several ideas, and I'm not sure whether or not they will work, so I figured I'd post here and ask for some tips. 1) Drill a 1" hole in the side of the evaporator housing in the engine bay, and use a water hose to clean out the evaporator, and housing. Wouldn't this leak water into the cabin? 2) Remove the blower motor, and use a vacuum to reach in and suck the debris out. This one seems logical, but will you gain access to the evaporator by removing the blower motor? 3) Remove the cowling, and use a water hose to spray down inside of it. Would either of these work? I don't want to seem like a complete idiot for posting this, but I've NEVER done work on an AC system, and taking it into a shop is not an option for me at this point in time. The AC is ice cold, and heat is hot, but you can barely even feel it blowing, no matter what fan speed, or vent selection. The air volume on high is equal to that of when you exhale out of your nose.