The aspirator motor just unclips from the bracket it is sitting in. You should be able to work one side loose and roll it out of the bracket. Then you can unclip the hose and the plug on the rear. Try spinning the little fan in there, the motor may be seized up. Set the temp wheel to max cold (dot on the blue band) and see how it does. That bypasses the cabin sensor and defaults to max fan and max cold.

If you have a very high load on the A/C and you're in a low humidity area, you may not get a sweaty return line. It should be relatively cold though. If it isn't, you may be slightly low on charge. Checking with a set of gauges would be prudent before attempting to tweak the charge.

EC should just give you ambient air from the outside intake if you're set to max cold on the temp wheel. If it feels heated, it probably is if the monovalve is leaking by.