I believe the reasons an electrical one goes out and why the manual ones go out are different except for one common problem seen these days with all things in a box... Poor/faulty production.
I usually begin suspecting my new part @ about the 3rd time things don't work.

Was the elec pump in before the new tank and lines and if so for how long? It could of failed from grit pumped before the swap maybe?


Give me ambiguity
or give me something else