PRESSURE WASHER TROUBLE SHOOTER
       Tech Tips and Troubleshooting
 

       Listed below is the problem you selected with causes, solutions and discussion

STUCK INLET OR DISCHARGE VALVES

Check valves and replace if needed

 Sometimes a valve will stick open or closed.  Usually there is debris stuck in the seat or springs.  Look at the valves and replace if needed.  

Generally speaking not ALL valves will go at the same time to the point you have zero pressure.  If 1 or 2 valves fail you will still have pressure.  The discharge hose will vibrate when one or more valves are damaged.  Having this vibration will not cause damage other than reduced pressure.  In fact, there are drain and sewer jetter valve caps that fit on pumps, which limit the operation of a valve to produce pulsating action.  Click here to read more about drain cleaning with a pressure washer.   

If you lose all valves at once then there is a serious problem somewhere else.  Your pump may have frozen, which could cause catastrophic pump failure.   

Valves on most pumps are made of a plastic cage with a metal seat held in position by a spring. Sometimes the cage will break due to debris in the supply water, allowing the valve to float.  The metal valve seat could be worn or scored due to dirty supply water.  The valve assembly sits on an o-ring that fits between the valve assembly and the head of the pump.  Click here for a selection of replacement valve assemblies.  Check this o-ring for wear and the brass seat for scoring.  

Usually this condition is caused by cavitation due to insufficient water supply.  Cavitation in this area will destroy your pump. The worm holes under the o-ring are in the head of the pump and not fixable.

Fixing your water supply problem and replacing the valves and o-rings will help for a while but the problem will soon return as the pressurized water will work it's way under the o-ring, through the wormholes.  For a discussion on pumps click here.  To see a range of replacement pumps click here.

 SOME OF THESE OPERATIONS CAN BE EXTREMELY DANGEROUS.  IF YOU DO NOT HAVE SUFFICIENT TRAINING IN THESE PROCEDURES, WE RECOMMEND YOU SEEK ASSISTANCE FROM A QUALIFIED TECHNICIAN



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