20 Most Recent Karcher K2.26 Electric Power Washer - Page 2 Questions & Answers

Yes, the on off switch is probably bad, go to karcher.com for parts and schematics.

Cracked casing or blown gasket due to freezing and not draining the pump.

You've cross threaded it...? Time for a new one... If its the actual pump then I'd take it back to them as they should be guaranteed, the hose is not.

there is no test for a magnetron or coil, either it works or it doesnt. the smaller wire that plugs into the "coil" is a shut off circuit when connected from the coil to the engine usually through a shut off switch. IF YOU DISCONNECT THIS WIRE THERE WILL BE NO WAY TO STOP THE ENGINE!!!! before purchasing a coil, go to a autoparts store and buy a inline spark tester to prove the coil has failed.

Dear Sir,
The power washer stops when the gun is closed. This happens because pressure is exerted on a control valve (Spill Valve)...which in turn touches a micro switch and cuts electricity. Now most probably your machine is dead because the spill valve is stuck down and closing the micro switch. This happens when one stores away the machine with pressure still in it. NEVER store a power washer with pressure in it. The spill valve also gets gammed because left with soap and machine not rinsed. I rarely service spill valves...I change with a new one.
To locate the spill valve open cover (using a TORX T15screw driver)...and where you see 2 wires coming out...there is the spill valve. If you can manage to do this..you can try if you want to lubricate it by spraying SILICON spray. If you get it out..you use silicon grease.
Sometimes these machines have the spill valve incoporated with the head....in that case the whole head must be renewed. The lack of pressure is sometimes also due to a faulty spill valve. So if this valve is corrected or changed the pressure returns. Weak pressure also is caused by faulty suction and delivery valves (6 in all). Remove the gun from machine...connect water...and start. Touch the outlet...if you feel suction ...the valves are faulty. Then for a few seconds try to test the inlet. Do this fast so that you do not turn the machine for long without water. If from the inlet you feel pushing....the valves are faulty. Which ever case always change the 6 valves.
Regards,
Fulltech.