Water pump won't shut off

Thank you all for the input. He is going to check the pressure switch to start with.

I will post the results.

Thanks

Ray

Low battery voltage can also cause continuous run

But it being an Artis could be just bad pump.......it is a WFCO Company product

A low water tank level will cause the pump to suck air. Are you sure your tank is full?

If there is air in the lines the pump will not shut off. Try opening all of the faucets and leave open until there is a good flow of water, no sputtering. Turn off the faucets and see if the pump stops.

My guess is you have a valve in the wrong position . Happened to me when my rig was new.

Is it filling the hot water tank? Good luck.

I've run in to a couple of new Shurflo bypass pumps where the bypass pressure was set higher than the cut-off pressure.
From the Shurflo manual

NOTE: By-pass adjustment should only
be performed by a professional technician with proper gauges and equipment.
The by-pass is a spring loaded diaphragm that opens up allowing water
from the discharge side back to the inlet side. The by-pass is set to begin opening
at about 40 psi and creating full by-pass at about 62 psi (lower pressure pumps
will vary depending on the by-pass and pressure shut-off settings). The pressure
switch on the pump is set to shut off at 55 psi. If the switch or by-pass
are adjusted too much, the by-pass and switch shut-off can overlap and
THE PUMP WILL NOT SHUT OFF.
Screwing the switch screw in clockwise will raise the shut-off pressure.
Unscrewing the switch screw counterclockwise will lower the pump shut-off pressure.
Screwing the by-pass screw in will raise the pressure at which the by-pass starts
and raise the full by-pass pressure.
Unscrewing the by-pass screw counterclockwise will lower the pressure at
which by-pass starts and lower the full by-pass pressure.
WARNING: If full by-pass is reached
before the shut-off setting, the pump
will not shut off. Full by-pass pressure
setting should be at least 10 psi higher
than pump shut off pressure.

Disregard if it's a different pump. :)

If it is pumping water, and not leaking, the pressure switch at the pump is bad. It could also be as simple as a particle in the pressure switch interfering with its operation.

My guess would be there is a leak somewhere in the system, not allowing the pump to build enough pressure to shut down. Just a thought.