Question about Karcher K3.68MR Electric Pressure Washer
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Posted on Jan 02, 2017
SOURCE: karcher power spray frost damage
I've found the most useful repair people for power washers are lawn mower repair techs. Give them a ring and see if they do house calls, they'll be your best bet.
Posted on Mar 09, 2010
Most pressure washers have ball lock type fittings on the hose connections. What happens is the little steel balls get a bit of corrosion and do not lock the male fitting properly with the female coupling. Load up the fitting with some Oil or WD 40. Then connect and disconnect the fitting several times to losen up the balls and springs. Should the spring in the coupling break you will get the exact symptom your describing.
If the OIL / WD 40 does not do the trick then you may have to change out the quick disconnect coupling.
Posted on Apr 18, 2010
yes...check the check valve. A one-way directional valve, this part is also known as a DUMP valve. It opens when too much pressure builds in the hand wand (when not spraying water) in order to protect the pump, by returning the high pressure to its source reservoir. I suspect the DUMP valve is stuck in open condition (or nearly open).
Posted on Jun 10, 2007
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.
Posted on Jun 14, 2008
SOURCE: karcher k7.80 pressure washr
I have a Karcher K 3.86 M electric PW with a similar problem: water leaks from the pump near the outlet and the pressure surges on and off continuously at intervals of 1-2 seconds. The leak appears to be coming from a very thin crack in the plastic pump head in what I think is the "unloader" valve portion. I read elsewhere that if you leave water in these PW's and it freezes it will crack, causing leaks. I don't know how you can empty all the water out so I think we must store these PW's in areas that won't freeze in winter.
Posted on Jul 16, 2008
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