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Expert Karcher Pressure Washer Repair Tips

Has your Karcher pressure washer seen better days? A broken down appliance is always frustrating – no matter what it is.

Luckily, the Ransom Spares appliance repair experts, Kevin and Tony, are here to help. They’ve spent the last month trying to turn a dishwasher into the ultimate flying machine.

However, they’re never too busy to deal with an appliance related nightmare – especially when a few expert tips are often all it takes to fix the problem yourself.

Here’s their advice for Karcher pressure washer repair.


Run water through the machine to deal with air blocks, pulsing and sticking bypass valves

If your pressure washer has an air block or pulsing/ sticking bypass valves, the first step is to disconnect the machine from the electricity supply.

Next, remove the black high pressure hose and connect the machine to a garden hose using a free flow connector, before turning on the outside tap and leaving the water to run through for five minutes.

You can then reconnect the black high pressure hose, and press the trigger on the gun to draw water through the hose and into the gun and jet pipe.


Make sure you store the pressure washer properly for winter

If your pressure washer isn’t stored properly, the cold winter weather can cause frost damage. Before putting the machine away, detach any accessories and tip away any water they contain.

You should then drain the machine to prevent any frost damage. To do this, press the trigger on the gun and wait until the water stops flowing out of the pressure washer.

Finally, make sure you store it in a frost-safe environment – and look forward to it working perfectly in spring!


If the machine is pulsing check that the garden hose is fully uncoiled

If straightening out any kinks in the garden hose doesn’t work, and the machine continues to pulse during use, it could be that there’s a blockage in one of the accessories you’re using.

In this case, try soaking the accessories in warm soapy water before rinsing.


If the machine cuts out, check the extension cable

Is your pressure washer cutting out? If you’re using an electric extension cable, it could be the culprit. The cable should be a 13 amp constant rating and not longer than 13 metres.


If the pressure washer is vibrating, check there is sufficient water flow

If the water flow is too low, it can cause the machine to vibrate more than usual. 1-4 Series machines will use around six litres per minute, whilst 5-7 Series machines will use around nine litres per minute.

You should also ensure that the garden tap is fully on and that your garden hose is completely uncoiled.


If the machine has lost pressure, check the hose

If your machine has lost pressure, the most likely cause of the problem is a kink, blockage or leak in the hose. You should also check that the water’s turned on full, and that you’ve checked how much water needs to be supplied in the manual.

The problem can also be caused by debris in the water inlet filter, trigger gun or nozzles. Try cleaning out these items and see if this fixes the issue.

A broken down appliance is a common problem, and an annoying one. But if your Karcher pressure washer isn’t working as it should, these expert tips should help you to fix the most common problems.

Find all of the Karcher spare parts you need on our Karcher spare parts page.

Category: Articles, News & Tips

Lee Gilbert
Author By Lee Gilbert
Date On 19th Oct 2015 at 08:24
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