I had a Hi temp shut down. I waited a few minutes and started it. But I noticed the little stream that shots out the back is not shooting out. Took the lines off and tried to blow air with my lungs. It wouldn't blow through from head back to pump. Should I be able to blow air through the line. Then I took the pressure relief valve cover off and the spring was broke. I also started the motor for a few seconds with the supply line off and water flow was very slow. No way it could push enough water to keep it cool.