K 3.98 M Electric Pressure Washer

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A defective spark plug or ignition coil may need to be replaced. Your power washer`s spark plug is essential to keep it running since it ignites the air/fuel mixture. If your spark plug is dirty, cracked, or defective, it could be the reason your power washer won`t start.
PLEASE NOTE: You should always press the RESET button on the GFCI before using the pressure washer.
Water leaking from a loose connection can cause the unit to cycle on and off. Verify if the pressure hose has an O-ring at the connection. If missing, this will also cause the unit to cycle on and off. While the unit is running look for any water leaks that may cause the unit to turn back on.
These include an incoming power problem, a damaged power cord, a malfunctioning door lid switch or lock, a defective user control board or timer, a broken drive belt, or a faulty or obstructed drain pump.
The electronic pressure switch automatically switches the pump on and off again on the pressure side as required. If there is no water running through the pump on the suction side, e.g. if the water tank is empty, the dry-run protection protects the pump against damage and automatically switches it off.
Here`s how it works, devices from the Home & Garden range can be repaired in our repair centres. Machines within their warranty period are repaired free of charge subject to our Home & Garden terms and conditions.
You should check the outlet to make sure it`s working. Then, check if a fuse is blown or a circuit breaker thrown. If those both work, see if the Delay Start button or Control Lock feature has been activated. Sometimes it`s as simple as opening and closing the door to reset the washer.
Unused fuel inside the carburetor starts to evaporate after a month, leaving a thick and sticky tar-like material in the carburetor. This substance blocks gas movement inside the carburetor, and your pressure washer keeps shutting off while working.
If you cannot shut off the water from the trigger wand and there are no known issues with the unloader valve, there is likely an issue with the wand itself. The trigger wand has a mechanism inside of it so that when the trigger is released, the flow of water is blocked.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Wont turn on , light on plug will not stay on after release of button
ANSWER : Most likely faulty switch. Use licensed repairman for electrical hazard.

Lack of power when using – Karcher K 5.85 M 1,850 PSI 1.5 GPM Electric Pressure Washer with Hose
ANSWER : I fixed mine works good easy too watch my video step by step i put it on youtubehttp://www.youtube.com/watch?v=UFXSLOBL0Mg

In the base of a karcher k2,27

Diagram attached hope this helps:)


1750 psi Electric Pressure Washer: My pressure washer is losing pressure and is pulsa…
ANSWER : If the pressure washer is pulsating then that is a sign of check valve failure. You may be able to clean of replace the check valves. Replacing the head is the wrong way to go. This is completely unnecessary. If you can tell me the model number of your pressure washer then I can assist you better in pointing you in the right direction.

Pressure washer has recently started pulsing-its like a lack of water but not-at least i think not-when top is removed from lance it seems okay but when put back on it starts ‘pulsing’ any advice please jim newcastle
ANSWER : There is probably dirt or a little stone in the nozzle of the gun.
its building up a high pressure and goes idle.
clean nozzle and try again

It won’t run, I checked everything ,hooked it up right.
ANSWER : Sounds like your pump is not engaging, I would check the wiring to the pump and make sure wires were connected and that none have been exposed to water and rusted, causing a bad collection.

High pressure hose. How do you get if off the karcher k 3.99
ANSWER : Hi, you have a little black clip in the gun hand where the hose pushes in, just pull it out and the the hose will pullout.

Karcher 4.91 checked fuse that is ok but no power
ANSWER : Check and see if you are getting power to the on/off swith. These switches have been known to go bad. Also, check the Ground fault breaker in the plug. Let me know how you make out.