DIYbanter - View Single Post - Swimming Pool Pump

wrote:
wrote:
that it runs and then shuts off after setting idle for a period of
time , tells me that it loses prime. Ckeck out the check valve that it
is not leaking.
If motor runs why replace it?

Because it's doesn't start up correctly. He said it just hums and
trips the breaker several times before starting. That isn't a prime
problem, it's a bad motor, which can be either rebuilt or replaced.

Adding in the timer shouldn't be any
problem.
Jack

Because "just hums" also fits the description of it runs, but is not
moving water.

Old pumps lose their ability to generate enough vacuum to prime. That
should be checked before motor replacement. And its a much more likely
circumstance.