The floor and walls will not dry out until the ground outside absorbs the water. I would avoid making an opening in a perfectly good wall. Once the outside ground water is gone, you should start to see some improvement.
Is it possible to dig a hole where the water is bad and pump the water to a different spot far away from you house?? Just a thought.
You could put a dehumidifier in the space. A dehumidifier is basically a refrigeration unit which is optimized to condense water vapor from a space. It will not cool the space and in fact will be a net heat source.
There would be a problem in getting rid of the condensed water. You would want to pipe it outside and have it drip into the ground. Some ...
An alternate method avoiding high electricity bills and the necessary water drain for the dehumidifier: Installing a fan of an old PC at the Luv side, connected to a small power supply from an old phone or similar and a timer. If the fan runs only in the night, it pushes in statistically colder and dryer air. In 1 or 2 weeks the space will be much dryer.
In the summer the temperature in the crawl space will be lower than ambient and exterior vents will promote condensation.
But yeah adding outlets from your air-con system that feed dry air to the crawl-space should work.
during the winter you probably want to feed outdoor air instead.
Air flow certainly can help, especially if the relative humidity is low. You would be better off with two windows open and staging 2 floor sized fans at the basement windows outside the house with one pulling air out, and the other pulling the air in.
This by no means is a "quick cure", but it's yet something that would have some positive effect on your ...
Sealing that joint is a low-percentage game. The patio probably moves with seasonal changes in ground temperature, and most products will let go after a few years, leaving you in the same position.
I'd do this:
Remove some decking to make access to the patio.
Using a rented diamond saw (chain saw style) or jackhammer, cut 2-3' off the foundation side of ...
Nothing special needed here except the GFCI since this room is not finished. Finished rooms in a basement depending on how long back may not have AFCI or GFCI protection but adding a receptacle in an unfinished basement room would require a GFCI even if no water present. The outlet can be directly adjacent to the equipment no spacing is required no covers ...