I have a Karcher K 3.91m pressure washer, it started to shut off a couple times when I last used it, I would turn the switch back to off, then on and it worked. (This model does not have the GFCI)...I let my neighbour use it, he said he turned it on and after 15 minutes it turned off, and when he turned it back on it was dead. I tried it the next day and nothing. I was told by a local company that it may be ? the electronic capaitor, this company has a shop rate minimum of 1 hour (@$90) plus parts....I can buy a refurb for $100, so before I buy the capacitor for $20, and install it myself, I was wondering if anyone has had this issue, and if so what was your fix.....thanks Darren
Most likely motor or pump overheated and seized or burnt out remove cover to the unit and test for motor operation
SOURCE: Karcher Power Washer Problem
I had the same problem with my Karcher. The recall was lifted Aug. 0f 2007. Tried numerous people at Karcher....head of Customer Service, vice president, etc. No one returns telephone calls not even cutomer service....poor, very poor customer service. Thinking about calling Germany.
SOURCE: No pressure in the pressure washer
Leaving the hose on shouldn't cause a problem so don't panic. It sounds like you could just have a dirty nozzle. Try sticking a pin or something in the end of the nozzle (machine not running) and giving it a clear out. also if it is a two peice gun, split it and tap the squirting part on something clean like a workbench to clear any debris that might have got in there.
SOURCE: Electric Karcher pressure washer surging when turned on
Dear firenutt681,
One simple thing you can do, is to check for leaks. Check if hose at machine is leaking. Check gun if it is leaking. You can also check if water still comes out of lance nozzel. These leaks however so small, will cause the machine to surge.
Another reason is due to a faulty SPILL VALVE. This spill valve( often called CONTROL VALVE) will contract when the gun is closed. When it contracts under the enclosed pressure it will switch off the machine by means of a Micro Switch. Now if this Spill valve is faulty it will loose its compression under pressure and puts on the micro switch again. This can be seen once in a while or more frequent, as in your case. I sometimes do service Spill Valves, but mostly I replace them with a new one. I do not know the model number of your machine, but normally you have to open the cover and you should spot the spill valve on the head. Most probably you see a thick wire or a cap containing the micro swith. If you find the micro switch, you have found the spill valve. Sometimes it is a bit hard to pull out the spill valve. Myself, in various Karcher models I remove the spill valve by trying to feed water and put on a bit the machine. In this way the spill valve will be spitted out.
Another reason which makes your machine surge, is leakage from from the detergent inlet.
If you do not see no leakages at all....then for sure it is the SPILL VALVE.
If you cannot do this job yourself or you do not find spare parts...you can continue using the machine as it is...but before closing the gun...switch off the electricity. I only recommend this in an emergency. You do this so that you do not leave the machine surging. This surge will for sure damage the electric motor and the capacitor (assuming it is single phase).
Regards,
Fulltech.
SOURCE: Unloader Valve - Karcher Pressure Washer
where is the unloader valve locaed on a Briggs Stratton pressure washer?
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What was my fix? I simply bought another pressure washer, lol. Seriously, my previous pressure washer had only 1800 psi and it was cheaper to buy another one in front of repairing of my old pressure washer. By the way, I was shocked by the variety of pressure washers on the market, however, thank heaven I found an article with examples of the best pressure washer for homes, and this article guided me what pressure washer to chose. So, with the help of that article I bought Generac 6602 OneWash gas-fuel washer with 3100 psi and I am pleased enough, so, I guess, it would be profitable for you to proceed in the same way...
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