Thank you Everyone for your help. So I had a tech.to check my machine and they couldn't find anything. They said, it's working fine. So I kept using it and It was overheating still and preassure is not strong as before when I put it on 900 psi. The psi gauge was down about 500 if I was cleaning and It came back up to 900
Psi if I was not using it and water was boiling like crazy and couple min. and machine shutdown. I had to rush my job to avoid automatic shut off due to water overheat. I used it for several weeks after the tech. Checked it and I noticed water was leaking from the cat pump. So I did thourough inspections and I found out that I need to replace the water pump seals. It cost me $200 for all that rubber seals and also to decide to change the relief valve on the water box. Jon-don told me to replace the valve, but I asked the tech. from schapers and they said, It doesn't need to change it. it took me almost half a day to fix it. After I replace the seals of my cat pump and relief valve, the water was not overheating anymore and Water preasure was working great.some pics for cat pump fix