After some hours it start flashing. Why? How?
Received what I ordered I a timely manner no problems.
Perfect replacement heaters for my unit. Restored an otherwise dead heater.
During a remodel O3 got removed from the wall for a time. Probably got water in the check valve because the painter had no idea what he was dealing with. So when it was reinstalled it was super noisy and produced no O3. Did a web search and ordered parts. Turned out it was only one check valve that was faulty. Replaced and it operates as good as new.
Those irresponsible liars sent a defective repair controller—or whatever it is—and refuse to issue a refund. They won't give the money back. They aren't a company; they're just pigs.