About 4 weeks  ago my pump started messing about 4 about 11/2, then run fine for three weeks then played up again. Got to the cause 3 new hoses and some small ones😀. 
I never new i was ill, 5 days after triple bypass home and recovery will be 3 - 4 months. 
Fortunately my son was able to step in and take over the work load till I’m fit.