You need to calibrate your pump controller or if digital set it to auto.https://www.youtube.com/watch?v=9kKoskb7l7c
Ten years old Could be getting tired. Check for air getting into your system first, flat tanks are prone to it during braking or simply leaking connectors. I take it the strainer is clean?
check battrey
10 YEARS OLD !!!!!Why are you even asking the question lmao
If there is air in the system it has to be getting in before the pump.Before pump = air in system After pump = leak