Troubleshooting Guide: Fixing Pressure Washer Pumps that Keep Cycling or Won't Turn Off

Understanding Normal Pump Function

Modern electric pressure washer pumps are designed to build up pressure until a target is reached, triggering a cutoff switch to stop the pump. When the pump isn’t in use, it may cycle on and off about 2-3 times in a 5-minute period to maintain its operating pressure. However, it is abnormal for the pump to run constantly or cycle frequently while not in use.

Check for Leaks

For units like the Active 2.3, continuous cycling or running when not in use usually indicates a problem with reaching the target pressure to activate the cutoff switch. To start troubleshooting, inspect the unit for leaks. Even a small leak can cause the pump to lose internal pressure and start cycling.

Inspect your machine thoroughly, including the bottom of the unit for any residual water, and check all accessories for leaks.

Check Aftermarket Accessories

If no leaks are found, the next step is to examine any aftermarket accessories. Ideally, you should use the original accessories that came with your pressure washer. Attach the original accessories and observe if the issue persists. If the problem disappears, it’s likely due to incompatibility with aftermarket accessories.

Accessory Compatibility Tips

High-Pressure Hose

For hoses, ensure that they are steel-braided, no longer than 100 ft in length, have compatible M22-14mm connections, and that any quick connectors in use are also M22-14mm compatible.

Gun and Lance

Check the gun and lance connections. If they are threaded, make sure the hose and lance are threaded as well. If the inlet and outlet are quick-connect, match your gun with the same connection type. Ensure that the pressure and flow ratings exceed the output of the pressure washer for optimal performance.

Nozzles

Verify that the orifice of your nozzle is correctly sized. A recommended range is between 4.5 to 6.0. Lowering the orifice size below 4.5 may cause the unit to draw more than 15A, which could damage the pressure washer’s internals. Always keep the spray path clear of debris using a cleaning needle to unclog any blocked nozzles.

Final Checks

Lastly, make sure your unit is completely leak-free, and all O-rings are intact to ensure optimal performance.