Well, damn. I don't think the pressure switch was your problem, it sounds like something is going on with your air dome pressure hose that connects between the outer tub and pressure switch. It's either clogged or you have an air leak. Try blowing air through the hose on the pressure switch side and make sure air flows freely through it. I also noticed you have an aftermarket clamp on the nipple of the hose on the pressure switch. Make sure the hose fits nice and tight at that connection. The hose connected to the outer tub should also be nice and tight (it uses that annoying spring clamp).
You can test both pressure switches by using a digital multimeter set to the continuity selection. You should hear a beeping tone when both leads are connected together. Connect the leads across (if I remember correctly) terminals 15 and 16 on the pressure switch. There should be no beep. I use and connect a piece of vacuum tubing to the pressure switch and blow through the hose until you hear a click. You should hear the digital meter beep when blown through the hose and the pressure diaphragm clicks. When the air is releases, it should stop beeping when it clicks again.
