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Overheating

Kärcher Pressure Washer

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

Karcher Pressure Washer Overheating — Fix

What Does This Error Mean?

Karcher overheating is caused by running the pump at idle (trigger released) for too long, which recirculates hot water. Always press the trigger regularly or switch off between uses.

How to Fix It

  1. Switch off and let it cool

  2. Avoid prolonged trigger-off idle running

  3. Switch off between tasks

  4. Check the water inlet temperature

  5. Check ambient temperature

  6. Reset the thermal cutout

Frequently Asked Questions

Can overheating permanently damage a Karcher pressure washer?

Occasional thermal cutout events cause no permanent damage. Repeated overheating accelerates pump seal wear and can eventually damage the motor windings. Avoid prolonged idle running.

How long can I run a Karcher before it overheats?

With the trigger pressed and water flowing, Karcher domestic models can run continuously for many minutes. Overheating occurs fastest when the trigger is released and the pump idles.

My Karcher keeps shutting off every few minutes even when I am spraying — why?

If the machine cuts out while spraying, the thermal cutout may be tripping from a combination of hot weather and a partially blocked nozzle increasing back-pressure on the pump. Clean the nozzle.