Why will my shower pump not turn on?

Reasons why a positive head pump might not turn on:

• There isn’t enough water flow to activate the pump, in this case a negative head (universal) pump should be installed.
• A blocked or scaled shower head is restricting the water flow.
• A twisted or damaged shower hose is restricting the water flow.
• There is no electricity to the pump.
• Debris in the filters to the pump, stopping the water flow.