Water Pressure Switch

NaliniPatel

New member
May 21, 2025
1
San Antonio
I have a Pentair Mastertemp and am getting a Water PS error. I opened the panel and I don't see any 2 wires connect to the Pressure switch . I have a Raypack Flow Switch also on the heater. are those 2 purple cables from the control board supposed to go directly on the water pressure sensor or to the flow switch????
Help me!!
 
Welcome to TFP.

Is your heater more than a few feet above or below the waterline?

A flow switch may have been required for your heater installation.


The flow switch probably failed and is not closing.

The flow switch can be tested with a multimeter.

Show us pictures of your heater and the flow switch.