Why does my high pressure washer run jerkily?

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Yesterday I went out to the dacha to wash my car and noticed a strange feature in the operation of the AWD, some time after turning it on it starts working in fits and starts, it feels like there is not enough water supply, it blows under pressure - delay - again under pressure at intervals of a second or two! If you reduce the “power” on the nozzle, then no problem! Sometimes this effect disappears and the sink presses as it should! Could such nonsense be due to insufficient voltage in the network? (high-quality electrification is still coming to us) or is it something with the sink? Unfortunately, it’s problematic to check elsewhere!

I don’t remember what kind of Karcher I have, I bought it two years ago for 8 thousand rubles. I'm not a professional in this matter, but this happens to me too, only to a lesser extent. Sometimes the jerking gets stronger, but rarely. Basically everything is stable. It would be interesting to find out why.

And my model 5.20 also works at the beginning of the wash. The device is 2 weeks old. My guess is there is air somewhere in the system. I remove the attachment (cutter) and turn on the Karcher for 10-15 seconds without it. Then everything is fine. Try it, maybe it will help...

For me, maybe at the beginning of the wash, or maybe at the end! I noticed that if you install a mud cutter, the interruptions sometimes stop. One of these days I'll try to power it from a well, we'll see what happens.

Try cleaning the nozzle on the spray nozzle.

How is the sink connected to the water? By gravity or to the central water supply. How long is the hose? Do you use a filter? There may be several reasons. But most likely the device does not have enough water. Therefore, he cannot create the proper pressure. Or there are air pockets in the system.

Nothing like this. It feels like yes, there is not enough water, but I have it connected to a watering hose. and there is pressure there.

have you checked the filter? Is the hose vibrating?

Do you know, this situation somehow resolved itself????

100% lack of water, there may be pressure in the hose, but not enough for the device, try gravity flow from the container, it will take as much as it needs. checked for myself, exactly the same sink.

Clean the inlet filter and everything will work. But this is so, offhand. Maybe it's sucking air somewhere. But most likely the inlet filter is clogged.

“Could such nonsense be due to insufficient voltage in the network? (high-quality electrification is still reaching us)” A friend had similar symptoms at his dacha due to unstable electricity! Now this is not the case - we have established a normal power supply!

no, your supply valve is soured or out of order, take the Karcher apart and dig deeper, it’s hard to explain, I was so tormented with mine, I wanted to buy a new one there, there is such a thing inside the Karcher body, when you press on the gun, it is pulled back due to the pressure and closes the contacts, the switch and the Karcher turns on and there is a valve in it with a spring that could skew the discharge and interruptions in the water supply, voltage has nothing to do with it

I have the same nonsense when there is not enough voltage

I had the same problem, it turned out that the voltage was 190 volts, I installed a 10 kW stabilizer, the output became 220 volts and still jerks, I bought a 6.5 kW gas generator, the problem disappeared.

I found my fellow sufferers, I’ve been using the 5.55 for exactly a year with no problems, I live in the private sector where they still use old appliances, cabinets and other electricity hogs, there weren’t any problems before. but this spring the problem of jerking began. I reduce the flow normally, but this is not enough, I wash more than one car. I don’t think that in the past year I’ve ever had a time when no one was using the network or overloading it. I recently disassembled it, nothing complicated took about an hour, I didn’t understand anything, it looked like an ordinary pump, only powerful, I disassembled almost everything except the engine, everything seemed clean, I blew it out with a compressor, reassembled it, and now it’s a miracle, the whole thing. But things won't stay the same for long. In fact, there is nothing like that inside, the mesh on the suction is very fine and does not let dirt in, and in front of the hose I put an old trace (like a sock) maybe a piece from tights, it also filters normally, dirty water does not affect the jerks at all, the pump just tries for a long time build up pressure in the hose, tell me who tried what and what did you do?

Karcher K5 does not turn on - why?

In fact, there can be a lot of reasons for this behavior, so we will now consider only one of the most common options for loss of performance. Imagine the situation: after winter storage in the right conditions with the temperature never falling below zero, the first start is not pleasing - your Karcher turns on and off, not agreeing to work normally. It would seem that it’s time to panic and run headlong towards the nearest repair shop. However, it is likely that you will be able to do without such actions if you approach the issue correctly. Let's try to carry out repairs ourselves, following the instructions:

1. If Karcher does not turn on, the reasons can hardly be determined without looking inside. Therefore, you need to start the process by removing the housing, for which you will first have to unscrew the bolts around the perimeter. After this, the housing can be easily removed, allowing direct access to the high-pressure washer mechanism itself.

2. The drive motor is unlikely to be to blame for this behavior, so if repairs are required, the Karcher will not turn on, most likely due to improper operation of the pump. Of course, a visual inspection of the engine won’t hurt either, especially since it will still have to be removed on the way to gaining access to the pump.

3. Next you will have to deal with the high-pressure pipe, carefully unscrewing its nut and avoiding damage during operation. This way we will not create new reasons why Karcher does not turn on.

4. The next stage is two clamps, as well as a detergent supply valve. As a result, you can finally get the required unit, although it will sit quite tightly in its place without latches.

5. Now you should see the scale that has accumulated during winter storage, which prevents the plungers from moving normally, as a result of which the Karcher 5.20 does not turn on.

6. All that’s left to do is clean the mechanism from scale and lubricate everything well with silicone waterproof grease.

7. Finally, the most important stage awaits us - reassembly, during which there should be no “extra” parts left.

The expected result of all these actions is a well-functioning mini-wash again, which will not bother you with malfunctions for a very long time. Now you know what to do if the Karcher K 5 does not turn on.

Causes

The main reasons for the incorrect functioning of Karcher sinks:

• Air bubbles have formed inside the underwater hose.
• In more rare cases, the cause of jerking is a loss of electricity.
• The most common cause of malfunction is the pressure valve. In this case, during operation, the installation can turn off for 1-2 seconds, after which it starts again.

If the check excludes air in the system and loss of electricity, then most likely the pressure valve spring is damaged. This element in the equipment is responsible for normalizing pressure and turning off the electric motor. In the event of such a malfunction, the unit may function with short-term interruptions.

The valve spring is made of durable stainless steel, but with intensive use it wears out. As a result, less pressure is required to operate the valve because its spring sagged. The phase starts, the pressure increases, and the valve turns off the drive. Then the pressure is reduced again and the installation is started again. The duration of this cycle is about 1-2 seconds.

Karcher does not turn on - reasons

Despite the fact that Karcher sinks are leaders in their industry, they also fail. If one day the Karcher sink does not turn on, there is no need to panic, in most cases the problem is not serious and can be easily fixed. Among the most popular reasons why the washer may not turn on are:

1. Control valve piston stuck. This problem leads to the fact that after turning the control knob, the device still does not turn on, since the piston does not move and cannot reach the desired switch lever.
2. Relay failure.
3. Piston failure.

In 90% of cases, if the Karcher does not turn on, the reason is a stuck valve. This problem usually occurs because the valve is where detergents pass through. As a result, it stops responding to being turned on.

You can repair the system yourself if you have basic technical and electrical skills. Sticking of the valve may be due to the constant passage of detergents through it, which are supplied through the plastic nipple.

To fix the problem, you need to disassemble the sink body. To do this you will need a screwdriver, hexagons and sprockets, you can also use a screwdriver to make the process go faster. Be sure to check that there is no water inside the sink and unplug it.

Prices in online stores:

First, you should disassemble the housing, then remove the clamp that secures the motor. The valve that interests us is hidden under a plastic nipple, but you won’t be able to get it out, you can only check the valve’s movement. To remove the valve itself, you need to open the 4 hexagons on the body, disconnect it, remove the electrical unit and separate the lower part. You will see a valve tip that presses on the disconnect end of the circuit, which is why the washer does not turn on.

Now you need to clean its seat, wipe it with lubricant, and if the spring is bent, bend it. However, if you do not have technical skills, it is better to contact a service center.

To reduce the risk of this problem happening in the future, you should invest in a foam attachment—foam is much lighter than stringy detergent.

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Washing a car, cleaning the garage or tidying up a summer cottage - all these jobs are greatly simplified by a mini-wash. Some models are quite suitable for washing pipes or concrete mixers. Unattractive and complex work such as cleaning stables or washing agricultural equipment is simplified many times with the help of this miracle device. The topic of today's publication is repairing a high-pressure washer with your own hands, because any equipment tends to fail after one or another period of operation.

Troubleshooting Karcher mini washers

The correct operation of a Karcher mini-wash, like any other equipment, depends on many reasons. Therefore, it is very useful to know how to eliminate the most common faults.

Miniwasher K 5 does not gain full power when turned on; to achieve operating power, it is necessary to change the pressure parameters several times. Over time, the situation only gets worse. Is it possible to fix the problem?

The standard algorithm of actions is as follows:

1. Check and, if necessary, clean the external and built-in water filters.
2. Make sure all connections are completely tight.
3. Remove air from the device according to the instructions

If the problem persists, the only option is to contact a service center, where, based on accurate diagnostics, it will be possible to determine whether it is advisable to carry out repairs.

Another reason for such a malfunction may be wear of the bypass valve. In this case, it is necessary to replace the collector housing.

There is no pressure on the dirt cutter of the mini washer. Cleaning and rinsing the nozzle does not give any results. What could be the reason?

Apparently, the problem is in the nozzle itself. If the warranty period has not yet expired, you can contact the service center, where specialists will quickly and efficiently replace the nozzle.

The high pressure hose is leaking.

First of all, you need to check the O-ring on the hose fitting for damage or deformation that appears if the hose is disconnected from the device without first releasing the pressure. Then make sure that the fitting itself is not damaged. If no faults are found, consultation with service center specialists is necessary.

You can also try connecting the hose to the device at the other end; If at the same time a leak appears from the junction of the gun and the hose, then the cause of the leak is the depressurization of the device coupling, which is also a reason to contact a service center.

The Karcher 5 miniwash turns off spontaneously after short periods of time. Before shutting down, you feel a weakening of the engine.

The described symptoms are very similar to the activation of thermal protection (thermal valve). The reason for this, in turn, is either overheating of the engine, or an excessively high temperature of the water used, or a malfunction in the thermal valve itself. If everything is clear enough with the last two options, then to find out the reasons for the engine overheating, it is necessary to carry out diagnostics at a Karcher service center.

It should be remembered that Karcher sinks are very demanding on power supply, so one of the possible reasons for the shutdown may be low voltage in the network. In this case, a voltage stabilizer is needed.

The mini-wash does not pump water from the tank, but it works normally from the water supply; Extraneous noise is heard during operation of the hose.

The reasons for this malfunction may be the following:

• Air entering the pump. In this case, it is necessary to act according to the operating instructions, i.e., start the device for suction, removing all nozzles. Pour water from the gun until it flows in an even stream, then put on the jet pipe and work with pressure.
• The hose may become compressed if it is too soft. Change the hose to a rigid one with a clamped fitting. When using homemade fittings for water intake, the check valve must be installed in the direction of water flow.
• The water filter in the inlet pipe is clogged. It must be removed and washed thoroughly; the filters located before the device also need to be washed

The specialists of the Karcher service center will always help you to correctly determine the cause of the malfunction and eliminate it as soon as possible.

In our online store you can buy mini-washers at a great price. We have different classes of models to perform different tasks. Buy exactly the device that you may need, do not overpay for unnecessary functions.

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