Karcher HDS745 pressure washer won't start. Power is confirmed to the cord. Won't make noise to lights.
A modern hot water pressure washer can have complex circuitry and it is a good idea to read the user instructions and have a diagram for reference when troubleshooting - certainly some dismantling will be necessary to trace the power rather further inside than the power cord.
If the unit hasn't been used for a time the pump could have frozen and have overloaded the motor when switched on - there is often a facility for the pump to be turned by hand to unfreeze the pump before switching on.
2/9/2020 2:24:45 AM •
Karcher Garden
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Answered
on Feb 09, 2020
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212 views
I have a hd 3.7/22-4sg karcher power washer the green light comes on and after a couple seconds it pops the breaker. will not do anything
Which breaker does it trip? The MCB or the RCD?
If the former, the motor is taking too much current and that might be caused by shorted turns, a defective centrifugal switch (if fitted) or a shorted start or start/run capacitor.
If the unit has been standing for a while it could be the pump is frozen - some units provide access for a hexagon key so the pump can be turned manually a couple of revolutions before switching on the power.
If the RCD has tripped it is because there is an insulation breakdown and current is leaking to ground.
10/17/2019 11:43:32 PM •
Karcher Garden
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Answered
on Oct 17, 2019
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146 views
Karcher k1800 no pressure
In my experience with karcher, and other brands, you will be money ahead to replace the pump entirely. Pumps usually cost around $125. There are some times rebuild kits available, but they will often cost over half the amount of an entire pump. Add to that the unloader valve, & you will be way past the cost of a new pump.
10/15/2019 1:51:02 AM •
Karcher Garden
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Answered
on Oct 15, 2019
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178 views
Karcher pressure washer
most likely motor or pump overheated and seized or burnt out remove cover to the unit and test for motor operation
10/13/2019 4:45:34 PM •
Karcher PSI...
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Answered
on Oct 13, 2019
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267 views
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