So, I finally upgrade to a pump system from my old pressure washer and DS setup. I set up the pump system when I got it and it worked well. So I let my worker take the truck that day and he left the pump in the truck bed overnight in below freezing temps. Now the pump isn't pulling. Is it possible for it to start functioning again?
It could be a few things...especially since it was left out to freeze.
Might be a cracked head, a cracked fitting, a broken or fractured check valve in the pump, a ruined seal/o-ring, etc...
You will need to try and use the process of elimination to detect what it might be. It could be a loose hose clamp letting in some air bubbles and that can cause a prime issue.