We use this water pump for about 2 years, and in the last week the circuit breaker trip when we turn on the pump. What should I check first for the problem?
It seems that your breaker has tendency become weak, first I would replace the breaker with a new one of the same amperage. You may have a filter on the supply pipe and if clogged it will draw more.
Is it a circuit breaker or a GFCI that is tripping? If a circuit breaker then the pump motor could be frozen or is binding, circuit maybe over loaded because there in now something else plugged into it or the circuit breaker is wearing out. If it is GFCI (and on a pump it probably should be) then you have a ground fault condition in the pump motor or the wiring. In which case I would suggest hire an electrician to sort out the problem.
When the pump motor starts, it engages a start winding that can draw enough current tripping the breaker in question. I would recommend that you change the breaker. It may have become weak after years of operation of said pump. It is a very good idea to dedicate a breaker for this motor. This configuration will insure that there's not another appliance in the circuit that may cause this problem of overloading said breaker when a limit switch closes to turn on the pump. Feel free to e-me.
