A common cause for lost water pressure is when the nozzle at the end of the trigger-wand becomes worn or blocked. An uncommon spray pattern may be an indication that there is debris blocking the nozzle. Nozzles that are wearing will usually cause a gradual loss in pressure, as opposed to happening suddenly.
Below is a table showing all the common symptoms of water blaster issues, we have compiled this and it will hopefully assist with you being able to solve any simple issue before needing to contact us where we are more than happy to assist you.
| Water Pressure Problems | ||
| What’s Wrong? | Cause | How to Fix |
| 1. Low pressure | Insufficient inlet water supply | Unkink garden hose, ensure full water pressure coming from tap, use large enough diameter garden hose (see manual) |
| Blocked inlet water filter | Remove garden hose connection and remove debris | |
| None or incorrect nozzle | Ensure correct nozzle being used | |
| 2. No pressure | Damaged unloader valve | Adjust unloader screw, check for damaged seals/springs |
| Damaged pump inlet valves/manifold | Disassemble pump and replace/clean components of inlet manifold | |
| 3. Pulsing pressure (high then low) | Damaged pump inlet valves/manifold | Disassemble pump and replace/clean components of inlet manifold |
| Faulty pump | Replace pump | |
| Pump sucking air | Turn off machine (but not water supply) and release pressure by squeezing trigger gun | |
| Obstructed nozzle, water inlet filter or gun/spray wand | Use needle to clear nozzle, fresh water to flush water inlet and vinegar to clear any deposits in gun/wand | |
| 4. Spiking pressure | Poorly calibrated unloader valve | Adjust unloader to proper pressure as per manual |
| 5. Pressure drops after a few seconds use | Nozzle blocked | Clear nozzle with needle |
| Issues with unloader valve | Remove unloader and clean/repair | |
| 6. Pressure washer isn’t cleaning the surface | Using wrong nozzle | Switch to higher pressure spray nozzle |
| Water Leaking | ||
| What’s Wrong? | Cause | How to Fix |
| 1. Water leaking from pump | Seals broken, cracked or worn | Return and replace under warranty |
| Loose bolts on pump assembly | Tighten bolts to ensure pump casing properly sealed together | |
| Thermal valve activated | Wait 5 minutes before using (it will de-activate once cool enough) | |
| 2. Water leaking from garden hose connection | Broken or improper connection | Connect properly |
| Broken rubber washer | Replace | |
| 3. Water leaking from spray wand or connections | Broken o-ring inside hose connection | Replace o-ring or return hose for new |
| Not properly connected | Connect properly | |
| Gas Power Washer Issues | ||
| What’s Wrong? | Cause | How to Fix |
| 1. Engine will not start | No gas | Fill with gas |
| Choke is wrong position | Move to correct position as per manual | |
| Pressure build up | Squeeze trigger gun to release pressure in system | |
| Spark plug wire not connected | Connect wire | |
| Faulty spark plug | Replace with new | |
| 2. Engine stops running while in use | Low oil level | Check and fill oil |
| Dirty air filter | Clean or replace it | |
| 3. Engine not providing enough power | Dirty air filter | Clean or replace |
| Engine not running at correct RPM | Adjust RPM to engine specs with pump detached | |
| 4. Oil dripping from engine | Worn seals | Replace seals (covered by warranty) |
| 5. Water in oil – looks milky | Worn or broken pistons allowing water through | Repair engine |
| Worn seals | Replace seals | |
| Electric Pressure Washer Problems | ||
| What’s Wrong? | Cause | How to Fix |
| 1. Machine won’t start | Electric outlet is faulty | Check main fuse, check plug |
| Not plugged in | Plug in | |
| Faulty motor | Return to supplier | |
| 2. Motor stops running while in use | Low voltage | Check voltage is within motor specified range |
| Other Common Problems | ||
| What’s Wrong? | Cause | How to Fix |
| 1. Chemical/detergent injector not working | Using wrong nozzle | Insert black soaping nozzle on wand |
| Soap tube inlet filter clogged (hose end that sits in soap bottle) | Flush with fresh water | |
| Soap inlet valve is clogged or blocked (pump side of tube) | Remove hose and use small Allen key to push through hole to remove debris/unstick the ball valve | |
| Detergent mixture is too thick | Add more water to dilute | |
| 2. Irregular bypass causing pressure fluctuations (sometimes) after use | Worn or broken unloader valve seals, springs or other components | Remove and replace |
| Unloader valve not properly installed | Remove and install correctly, properly seating the valve at the bottom of the pump housing | |
| Water leaking from unloader valve | Replace worn or broken seals and re-install unloader valve to specification | |
| Dirt in unloader | Remove and clean | |
| 3. Excessive noise | Water intake is blocked | Check and clean or replace |
| Not enough oil in engine | Check and add oil | |
| Not enough oil in pump | Disassemble and check (if possible) and add oil, otherwise return under warranty | |
| 4. Oil leaking from pump | Loose bolts/fitting | Check and tighten |
| Damaged parts like seals or pistons | If comfortable disassemble to check, clean and replace, otherwise return under warranty | |
At Pressure Solutions there are many reasons for why we will be your go to for all of your pressure cleaner and high pressure equipment needs, see below for those reasons.
