What is the most common problem with pressure washers?
Many pressure problems begin and end at the unloader. A cracked o-ring, dirt caught in the spring or a stuck shaft are the most common issues solved by simply removing the unloader and cleaning/looking for issues.
Why does my pressure washer rev up and down?
The engine of your pressure washer may rev sporadically because it is experiencing an intermittent blockage of the air that it needs to function properly. The first thing that you should do is to check the air filter for clogs caused by debris or dirt. Clean out any clogs that you find and the erratic revving may stop.
Why is pressure washer surging?
Surging Pressure Washer Troubleshooting Tips
It is telling the operator that the water supply does not meet the pump’s recommended flow rate. Check that the water supply and inlet screen are unrestricted. Check to see if the water supply does meet the necessary flow rate.