If you end up needing a replacement switch they have it here a bit cheaper: http://www.h2opoolproducts.com/produ...roducts_id=542 - still $75 and overpriced but that is half what they wanted!

Another option if your unit is under warranty would be to call and say your unit flashes no flow and you can't figure out why. The switch is probably considered a throw away part so either they wouldn't want the old one back or would chuck it in the trash without paying much attention when they got it back. Not saying you should do that, use your own moral judgement, just putting it out there.