Hi I am new to this , I’ve been doing carpet cleaning for 5 years now and we just bought a van with a 1800 steamaction truck MT . It was working perfectly fine and now it doesn’t have good pressure... when we run it straight from a water hose it starts working a little but the pressure won’t go up and just slowly starts loosing pressure again ... the water pump it spinning just fine , the waste tank is complete empty as well... maybe the seals from the pump are going out ? Please help