Flushed Hot Water Heat now Dishwasher Not Working

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This is about a Samsung DW80M2020US/AA 00 dishwasher. It is less than 3 years old.

A few days ago, as a part of regular maintenance, I flushed my Rheem hot water heater for the first time (also less than 3 years old). Everything went well, and after the tank filled up again, I ran all the faucets in the house to get any/all air out of the system.

I realized within ½ an hour of completing the maintenance the “Normal” light was blinking on my dishwasher. I looked it up in the manual, and saw this is an error message to indicate a leak or a main PBA problem. I removed the base plate and didn’t see any water or feel any moisture. I assumed then that air must have gotten into the inlet hose and the machine mistakingly took this as a leak, but I wasn't sure how to fix it. I called Samsung multiple times and followed their guidance. I also looked up additional remedies on various appliance repair forums. Between all these sources, these are all the things I’ve done to try and remedy the situation:

  1. Turn the unit off and on several times, thus forcing it to flow, flush and drain water in an attempt to push any air out of the system.
  2. Turned the unit off at the circuit breaker and let it sit over 24 hrs to drain all electricity and reset itself (I've tried this multiple times now)
  3. Left the door open 12+ hours to allow the unit to completely dry.
  4. Detached the water inlet hose from the supply line (not from the machine itself), allowed it to drain and completely refill.
The light is still flashing, and I’m unsure what my next steps should be. It seems highly unlikely to me, given the timing, that the hot water heater flush and this error code aren’t related; so I'm leaning towards a PBA problem. However, I haven't been able to find any guidance on a fix for that... just people saying at that point you should buy a new washer. Does anyone have any ideas on how to confirm PBA problem before I invest in a new washer? Also, how do I ensure this doesn't happen again whenever I need to flush my hot water heater in the future?

If you think I'm on the wrong track with the PBA, any guidance or alternative solutions are very welcome!!
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