I have a Karcher HDS 3205 BE. The heater has been idle for 6 months. I am not getting diesel to the nozzle. I have tested with water pressure, have fuel in the tank and the thermostat maxed. There is a pressure switch that assures that water is present in order to avoid heater problems. I am at a loss as to determine how the pressure switch works as there are no electrically controlled valves that I can see. Any ideas? Karcher doesn't list my machine in their list of owner manuals. How can I get one? Any help offered is appreciated! [wsmile]