## **How to Fix a Pressure Washer: Troubleshooting Common Issues and Getting It Running Again**
A pressure washer that sputters, loses power, or refuses to start can ruin a weekend of cleaning. The good news? Most problems are simple to diagnose and repair at home. This guide walks you through the most common pressure washer issues and shows you exactly how to **fix pressure washer** problems fast—without an expensive service call.
### **Why Your Pressure Washer Won’t Start**
If the engine won’t fire, check these first. **Spark plug** issues are the top culprit. Remove the plug, inspect for carbon buildup, and replace it if worn. Next, verify the **fuel supply**—old gas clogs carburetors, so drain stale fuel and refill with fresh. Finally, confirm the **on/off switch** and **choke** are set correctly. A flooded engine? Wait 15 minutes, then try again with the choke open.
### **Low or Surging Water Pressure**
Weak pressure usually points to a **clogged nozzle** or **dirty inlet filter**. Remove the nozzle and clear debris with a wire brush. Rinse the garden hose filter screen under running water. Air in the line? Squeeze the trigger until flow is steady. If surging continues, inspect the **O-rings** on the hose connections—cracked seals suck air and kill pressure.
### **Water Leaks and Pulsing Flow**
Leaks around the pump or wand waste water and drop performance. Tighten all fittings and replace worn **O-rings** immediately. Pulsing often means the **unloader valve** is stuck or the **pump** is starving for water. Ensure your garden hose is fully open and not kinked. For a deeper dive into quick fixes, this guide on how to fix pressure washer issues covers seven proven repairs.
### **Detergent Not Dispensing**
Soap not mixing? The **detergent siphon tube** may be clogged or disconnected. Flush it with warm water and check for cracks. Also confirm you’re using a **low-pressure nozzle**—detergent only injects at low PSI on most models.
### **Preventive Maintenance Tips**
– Flush the system after every use.
– Store the unit indoors to prevent freezing.
– Change the **pump oil** annually.
– Use a **fuel stabilizer** for seasonal storage.
### **When to Call a Pro**
If you’ve replaced the spark plug, cleaned the carburetor, and checked all seals—yet the unit still fails—the **pump** or **engine** may need professional service. But for 90% of issues, the steps above will get you back to blasting grime in under an hour.
**Ready to restore full power?** Grab your tools, work through this checklist, and get your pressure washer running like new today.