Did you post the mod on Braumeister forum under the name “Mashy”?I can only recall BM pump getting blocked with fermentation., and even then it clears.
Seriously never been a problem.
Apart from the time doughed in, closed the malt tube up, pressed start and nothing happened. Then I saw the impeller stuck to the wall in front of me. Oops
I will find it and repost.