Unless you pull a panel off and look, you can't know if it's leaking (probably overflowing) and could be dripping down on sensitive parts.
If it's leaking from the fitting, the only way to resolve that is to cut the pipe off, screw in a new fitting, and rebuild it from there. But, if the drip pan in there is clogged up, or the fitting is clogged, you need to clean that out first. If I were to rebuilt it, I might put a T instead of that elbow with a plug so I could take that off and run a brush or a piece of coat hanger in there to clean things out.