Answer
Oct 27, 2025 - 12:46 PM
Why Is My Pressure Washer Surging?
If your pressure washer is surging — meaning the motor repeatedly turns on and off without trigger activation — it’s often a sign of a leak in the system.
Common Causes of Surging:
- Cracked Pump Head: If the unit was exposed to freezing temperatures, ice expansion may have cracked the pump head, allowing pressure to escape.
- Damaged Hose or Fittings: A worn or punctured hose can also cause pressure loss.
- Visible Water Leak: Water pooling directly under the unit is a strong indicator of a leak.
What’s Happening Internally:
The machine builds pressure and shuts off as expected. However, due to the leak, pressure drops prematurely. The motor then “surges” — turning on intermittently — to compensate for the lost pressure, even though the trigger gun hasn’t been engaged.
How to Fix It:
- Inspect the pump head for cracks or damage.
- Check all hoses, connections, and seals.
- if possible, replace any damaged components.
- Avoid storing the unit in freezing conditions without proper winterization.
