Troubleshooting
- Disconnect the machine from the electricity supply.
- Remove black high-pressure hose.
- Connect garden hose to machine using a free flow connector.
- Turn on outside tap.
- Leave water to run through machine for 5 minutes.
- Reconnect black high-pressure hose.
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Page Contents
How do I fix my pulsing Kärcher pressure washer?
Set the spray wand to high pressure. Clear any debris from the nozzle. If the nozzle has even a little bit of dirt in the tip, it may cause enough obstruction for the pressure washer to pulsate. If your pressure washer came with a nozzle cleaner, use it to clean the tip.
How do you fix an electric pressure washer that won’t start?
Why does my pressure washer keep starting and stopping?
Another possible reason your pressure washer starts and stops after a few minutes is that the fuel cap vent or the fuel filter might be clogged. What is this? The fuel cap allows air into the fuel tank so that it can continue to deliver gas to the carburetor even as the fuel level gets lower.
Why is my pressure washer motor surging?
Surging occurs when the pressure is fine and then weakens. It is caused when the flow rate for the pump cannot be supported by the water supply. Problems can mount from there so it is important that it is dealt with as soon as possible.
How do you troubleshoot a pressure washer?
Why does my pressure washer shut off when I press the trigger?
A pressure washer shuts off when the pressure inside the pump increases higher than the engine pressure. Inspect the unloader valve to check for the dirt around the spring, stuck shaft, or worn-out O-rings. You need to disassemble the unloader valve for a thorough inspection.
How do you fix pulsating water pressure?
How do I fix my pressure washer surging? How to Troubleshoot a Surging Pressure Washer
- Remove the nozzle and clean it with a nozzle cleaning kit. You may have a partially plugged spray nozzle.
- Check the unloader and repair or replace it.
- Check the inlet hose and filter.
- Secure an adequate water supply.
- Inspect valves and clean or replace them as needed.
Is there a reset button on Kärcher pressure washer?
If your electric power washer won’t start, hit the “Reset” button on your power outlet, if it has one, or check your fuse box for a tripped circuit breaker.
Why is my pressure washer revving up and down?
The engine of your pressure washer may rev sporadically because it is experiencing an intermittent blockage of the air that it needs to function properly. The first thing that you should do is to check the air filter for clogs caused by debris or dirt. Clean out any clogs that you find and the erratic revving may stop.
Why will my Kärcher pressure washer not start?
One of the reasons why Karcher pressure washers act up is because of a failsafe mechanism. Some of the brand’s pressure washers won’t start if the machine accumulates significant air, turning on their airlocks. If so, the possible solution to this problem is to bleed the air out of the washers.
Why did my pressure washer stop working?
Remove and clean it, and you should be good to go. Assuming water is flowing through the pump properly, start the engine, hook up the hose and wand and see if it works. If not, you have a collapsed or kinked hose or a clogged wand. Both problems can most likely be fixed quickly without professional help.
Should I run my pressure washer at full throttle?
These air cooled engines need to be run at full throttle at all times. Use the proper tips to reduce pressure, not flow.
How do you adjust the governor on a pressure washer? 
How do I reset my electric pressure washer? 
What is the most common problem with pressure washers?
Summary Table of Troubleshooting Tips:
| Water Pressure Problems | |
|---|---|
| 1. Low pressure | None or incorrect nozzle |
| 2. No pressure | Damaged unloader valve |
| Damaged pump inlet valves/manifold | |
| 3. Pulsing pressure (high then low) | Damaged pump inlet valves/manifold |
• Oct 26, 2021
Why is my pressure washer not building pressure?
In general, the most common reason for a pressure washer not building pressure is that it is not getting enough water. This can be due to a hose problem, leakage, or blockage. Another reason can be air can get trapped inside the pressure washer pump or a problem with the nozzle.
How long does a pressure washer last?
In general, most well know pressure washer companies guaranty their machine for at least 500 hours. Most persons use it for around 50 hours each year. That means that a well-maintained pressure washer should last at least 10 years.
Why do pressure washers fail?
The reason for pressure washer pump failure is not always natural wear and tear. A faulty unloader valve, cavitation, and water overheating can be some other big reasons behind pressure washer pump failure.
Can you fix a pressure washer pump?
You can’t replace your pump with any pump you wish, because they just won’t fit. Determine if your pressure washer uses an axial or triplex pump. Axial cam pumps are less expensive and produce enough PSI to tackle most homeowner jobs, but they don’t last as long.
Do electric pressure washers have fuses?
Check the Fuse: If you have done all the repairs and replacements and your electric pressure washer is still not working, it may have something to do with the fuse. Inspect the fuse if it is blown or not. Replace the blown fuse with a new one and test the device again.
Where is the fuse on electric power washer?
Some electric pressure washers have a GCFI located near the end of the power plug. Press the button to reset the GFCI on the power cord to get your pressure washer electrical power. A fuse is usually located in the GCFI area of the electric power washer power cord.
How do you fix a pressure washer motor? 