Kärcher residential electric pressure washers are equipped with a Ground Fault Circuit Interrupter (GFCI) for your protection. The Consumer Product Safety Commission recommends that you test all GFCI's once a month. Since the frequency of pressure washer use varies, we recommend that you test the GFCI as part of your startup procedure each time you use your pressure washer. To learn how to peform this test on your unit, click on the image below that most resembles the GFCI on your Kärcher electric pressure washer. A PDF will open with the appropriate testing instructions.

To learn more about GFCI's, visit:
http://www.cpsc.gov/cpscpub/pubs/99.html