re: A/C drip pan full. Bleach down PVC drain pipe?

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Should that clean it out?

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It should, if you did it right. I would do a pass with blowing and then with sucking from your wet vac. Put your hand around where you stick the vac to the PVC to form a good seal.

But this is just what you’ve done to the PVC connected to the overflow pan below the AC, right? That’s the secondary drain, and if water is accumulating in that pan then your primary drain is clogged too. Under normal operation, water shouldn’t even go into the overflow pan because that is a “backup” drain.

To clean your primary drain, since the pipe is typically glued straight to the AC unit, you’ll have to cut the other PVC line about a foot away from the unit, then use the vac on both sides of the cut to make sure the entire line is unclogged. Then use a 3/4” PVC coupling and PVC cement glue to glue the line back together.