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Posted on Jan 02, 2017
SOURCE: Electric Pressure Washer
Hi Your problem is your unloader pressure valve switch.It is a cylinder that moves up & down inside a housing,. activaded by water pressure.Inside the cavity of the housing is dirt on the wall of it.Thats your problem.Once you clean the cylinder wall & apply some water grease ,problem gone.Your problem is not the switch.
Posted on Feb 14, 2008
Most pressure washers when their gun is released, the machine stops automaticaly. This is done ny means of a control valve. When the gun is closed...pressure is built and the control valve moves and switches a micro switch off. In your case the micro switch is still closed in off position. Now this happens if a machine is left and stored with pressure in it., This control valve could get jammed and leaving the micro switch in off position. It could also stay in off position by sticking, due to incorrect chemical.
So the control valve or even called spill valve, must be renewed.
Sometimes a little lubrication with the right type of silicon grease will get the control valve working again. This job is sometimes delicate and better done by a qualified technician.
Posted on Apr 12, 2009
I have the same problem. With mine I have to remove the tip that I am using then pull the trigger and then replace the tip and pull and pressure should return. I believe that one of my valves is sticking causing me to reprime the pump frequently. I am trying to clean or replace my valves to fix the problem.
I hope this helps.
Posted on Apr 25, 2009
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