This usually means the internal circuit breaker has tripped from overheating. It's a safety feature.
- First, turn the power switch to the OFF (O) position.
- Unplug the unit from the outlet and let it cool down completely. Give it at least 30 minutes.
- While it's cooling, check that your garden hose isn't kinked and the water source is fully open. A restricted water supply makes it work harder and overheat faster.
- After it's cool, plug it back in, turn the water on fully, then set the switch to ON(I) to restart.
If that didn't work: The supply voltage might be below the minimum. Make sure the pressure washer is the only thing running on that circuit. Try a different outlet.
Heads up: Always keep the unit clean and free from oil and grease. Blocked airflow from dirt will cause it to overheat and trip repeatedly.