Cleaning solution isn't siphoning to washer wand

These units come with a detergent bottle that attaches to the spray wand. The manual describes what detergents to use and the attachment reduces the pressure and siphons the right amount of detergent from the container. It is not a good idea to try to run detergent through the pump.
Here is a link to the operating manual for a similar pressure washer.
http://www.ppe-pressure-washer-parts.com/files/1961581/uploaded/pw0501400.pdf.

Pressure washers usually will not draw soap on high pressure setting. Switch wand or set wand to lower setting. Pin hole leak in soap line can also cause problem.

There is no need to prime. But you do need to use the black spray nozzle to get soap to siphon out.
if that doesn't solve the problem let me know

You have to use a low pressure nozzle ( usually black with very large spray opening) With the low pressure nozzle siphons your detergent in with the spray water . If you are using a high pressure nozzle the soap will not prime.

This model pressure washer will only siphon from the soap dispenser when you have the low-pressure nozzle attached and then will only sort of dribble out the suds. Good for sudsing, but no good for cleaning. You'll have to suds 1st then change to a highwe pressure spray nozzle to perform the actual cleaning. If it won't siphon with the low pressure nozzle either, then check for a blockage (old, dried soap) in the suction line tubing. Hope this helps!!

clean and soak all valves if do get work do not leave solution in it over time.carb cleaner with that little straw

The siphoning mechanism on almost all power washers use "The Venturi" effect to suck up the detergent. Basically, there's no pump...the force of the water passing the siphon hose causes a vacuum which draws the detergent up the tube. There's a small ball that is supposed to fall and block the tube when the trigger is released so it sounds like it got jammed up in there somehow. You could it apart and free it up but I would recommend just purchasing an external detergent dispenser. Home Depot carries them for about 15 bucks. They allow you to use soap with high pressure and bypass the always problematic siphon system.

Soap may be too thick. There may be a click/slide setting with the wand or gun

The chemical injection system works by siphon action. You must have the black or largest/ low pressure tip installed for it to work properly. If you feel any pressure at the wand, most likely will not work. If your wand has the adjustable type tip, it may have a restriction causing pressure and not allowing siphon action. If you continue having trouble with siphon, you could plug/shut of siphon and install an aftermarket injector between the wand and the pump (not expensive). Sold at www.pwmall.com Good luck

Are you putting the soap nozzle on the end? Either that or depending on what type of nozzle you have, some times you pull out or push in the nozzle to switch it to soap.

There has to be no pressure to draw the soap, so you either have to put in the soap nozzle in, or if it has an adjustable end, set it to soap by pushing or pulling.

You cannot spray high pressure with soap unless your unit is equipped with another siphon hose for pressure soap.