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I am getting a buzzing noise when I turn on my karcher 2.94 power washer and nothing else, I have replaced the capacitor but still no joy, any suggestions please

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Posted on Jan 02, 2017

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SOURCE: my karcher hds 745 has started blowing fuses. it

you have an electrical short in the motor windings. you'll have to either replace the motor or buy another washer. also check to see if the motor isn't locked up with a piece of trash. to do that you'll have to dissassemble housing until you get to the motor. it should turn easily by hand. if so you have a short.

Posted on Apr 21, 2009

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SOURCE: my karcher hds 745 has started blowing fuses. it

Dear dumbelldaveb,
Having a 13A fuse I am concluding that the machine is single phase. Most probably you have a faulty capacitor. Check the capacitor and if you find it expanded and leaking...then you must change it with a new one. If you see the capacitor is normal just the same it could be shorted. So change the capacitor with a new one and try to start the machine WITHOUT LOAD. Which means no water inlet and no gun attached. Doing this you can also remove temporarly the micro switches. If the motor still hums, then most probably there is a fault in the electric motor.
Now if you find out that the fault is the capacitor (which in my opinion it is the case)...you must see why the capacitor broke. If when using the machine and the gun is closed, the machine starts on and off on its own,...this will damage the capacitor. This on and off fault could come from a leaking gun. Or a leak from the seals. Whatever....the machine must not be left going ON and Off when the gun is closed. This ON and OFF could be due to faulty micro switches and control valves.
I am very sorry to mention a lot of things, but I hope as in many cases,..the changing of the capacitor will solve the problem. I wish to add that the electrical lead wire must be checked. On many occasions I found that the electrical lead wire from the plug to the machine was damaged and shorted, ..due to pulling, wear and tear.
Regards,
Fulltech.

Posted on Apr 22, 2009

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SOURCE: karcher 2600 psi pressure washer wont stay running

Remove and clean the carburator. Sound line a stuck needle on the float. 

Posted on Apr 22, 2009

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SOURCE: Karcher pressure washer 411A. loss of pressure...

411a when i turn on it gos for 1 min then i have too press it on and off 3or 4 times befor it works and it only stays on for 1 min.

Posted on May 21, 2009

  • 1 Answer

SOURCE: karcher pressure washer motor buzzes when switched on

I am no electrician but open black plastic case and check capacitor .If it does not show burnt signs then smell it to see if its burnt.It could be a number of other things if it is not a capacitor.
remember to short the terminals on the capacitor with an insulated screwdriver . a capacitor sort of acts like a battery and can sometimes store a nasty charge .BE careful or have a sparky check it for u .They should not charge u much to do a 5 second test with a meter

Posted on Feb 10, 2011

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1 Answer

When you turn the on/off switch to on position it just buzzes and then turns off.


This problem, is most probable due to a faulty condenser (capacitor). If one changes the capacitor and the machine works....one must see why the capacitor went faulty. This could be due to a faulty pressure regulator (Spill Valve) or faulty inlet and suction valves. If before the machine went buzzing, it started jerking and going on and off.....then as I said the regulator or valves are faulty. When this happens, the capacitor goes over active and will stop functioning. This information is general, because I do not know what model you have.
Regards,
MG.

Feb 11, 2015 | Karcher Garden

1 Answer

My presure washer will not turn on.


does it make any noise when connected to mains,if yes then two possibilities, capacitor is faulty, or motor damaged.
If no noise, then input fuse or motor open circuit. also check cable for damage.

Nov 18, 2013 | Karcher Garden

1 Answer

When turn on power fuse/breaker trips on power up


try to free the motor by turning it somehoe if its free replace running capacitor

Aug 16, 2013 | Karcher 1750 psi Electric Pressure Washer

1 Answer

Karcher K2.94 intermittent pumping and buzzing


try the machine with the lance removed from the gun.

buzzing is usually the noise made by the motor when it cant turn. if the pump start to pruduce pressure but the pressure builds up too high then the motor will stop turning... faulty lance or faulty spill valve (dump valve)

If you have a Karcher then you should always post your machines barcode.
The karcher barcode is on a silver sticker and is usually 15 digits long. Example 156987400000123 is actually model 1.569-874.0 and serial number 00123....

Aug 05, 2013 | Garden

2 Answers

When i switch my karcher on the motor makes o noise and does not turn


This sounds like you may need a new capacitor. It is not a costly part to get. What the capacitor does is "jump starts" the motor so if it broken the motor will not start.

A test you can do is if you take off the front caseand then set the machine up as if you were going to use it. then when you turn on the machine quickly push the fan blade of the motor with a flat headed screw driver. If this makes the machine start to work, then you know that you need a new capacitor.

Just be carefull when doing the test.

Please remember to thumbs up :)

Apr 03, 2011 | Karcher K2.26 Electric Power Washer

1 Answer

When connected and switched on my kb 4040 just buzzes


Sounds like the start capacitor is faulty. take out capacitor and if it is burnt replace with new one.

Jan 31, 2011 | Karcher Garden

1 Answer

This machine was purchased in October 2008. Has had minimum use because of water restrictions in Brisbane and since that has changed started using it more recently and now won't go. When turned on the...


this sounds like it could use a new capacitor. What the capacitor does is jump starts the motor and fan in order to run the machine. It is not a costly part to change and you should get the part at your local dealer/supplier as the K5.93 isn't that old of a model. There is a simple test that the technichian can do to make sure if its the capacitor.

If you give me the 1.xxx-xxx.0 number on your machine silver plate I can get the exact part number for you.

Jan 23, 2011 | Karcher K 593 M Electric Pressure Washer

1 Answer

Karcher pressure washer motor buzzes when switched on but does not run - help !


I am no electrician but open black plastic case and check capacitor .If it does not show burnt signs then smell it to see if its burnt.It could be a number of other things if it is not a capacitor.
remember to short the terminals on the capacitor with an insulated screwdriver . a capacitor sort of acts like a battery and can sometimes store a nasty charge .BE careful or have a sparky check it for u .They should not charge u much to do a 5 second test with a meter

May 02, 2010 | Karcher Garden

1 Answer

Karcher K2.91M nlets water in and out but won't


wot like a buzzing noise if so try and turn the fan at the rear of the motor if you can do this it is more than likley the capacitor

Dec 04, 2009 | Karcher K2.26 Electric Power Washer

1 Answer

My karcher hds 745 has started blowing fuses. it switches on the power light comes on and it makes a buzzing noise for about five seconds and then blows the mains 13amp fuse. i have replaced it twice but...


you have an electrical short in the motor windings. you'll have to either replace the motor or buy another washer. also check to see if the motor isn't locked up with a piece of trash. to do that you'll have to dissassemble housing until you get to the motor. it should turn easily by hand. if so you have a short.

Apr 19, 2009 | Karcher 2500 PSI Pressure Washer

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