Just had my MP40 failed on me. Walked by the tank and saw lights on the controller blinking. The pump was turning with the blink but not really pushing any water. I had new extra wp40 so I swapped out the controller but same issue. Then I tried replacing the AC/DC adapter and that was the problem. Now I need to look into the warrantee and getting a replacement adapter from Jebao.
Hope this helps anyone encountering this issue.
Hope this helps anyone encountering this issue.