Blocked Pressure Switch

Howdy-

New Jandy heater wasn't coming on this year. Error said its the pressure switch. Unscrewed the copper tubing, fired on the pump, and no water if coming out. I unscrewed the pipe at the header, and water isn't coming out there either, so the pipe isn't clogged. What gives? I turned the heater off and used a wire to make sure there's nothing blocking the adapter to the header.

Thanks,
Kevin

PS. Is water even supposed to travel to the switch or does it trigger off of low air pressure?

Well, no replies but I figured it out. There was debri blocking the hole in the header, where the pipe to the pressure switch leads out. Just needed to remove the copper pipe and poke the stuff with a screwdriver.

Hope this helps someone....

Kevin