The pressure may also suddenly change from low to high. Unsteady low pressure is basically the water coming out of the nozzle with the pressure lower than normal. If there is, it means that your seals are damaged, which is the reason for the low pressure. Then inspect the piston seals and if there is any water leakage. As a result, your pressure washer runs with very low pressure.Īfter clearing the dirt and debris from the pump valve, move towards the seals and check for any excessive wear. Also, check the inline filter because with time, dirt and debris gather inside the inline filter, and they increase to a significant level after a couple of washings. If there is no visible damage, then check the valve of your machine for any dirt blockage. You can diagnose the problem in the pump by first checking the head of the pump. The cylinder of your pump does not produce enough pressure and misfires, resulting in a decrease in pressure. This pulsating low pressure mainly occurs due to a pump malfunction. Pulsating low pressure feels like a hard vibration of a spray gun during pressure washing, also known as cavitation. First, we will discuss each element one by one and then the components that you need to check to diagnose the cause of low pressure. Low water pressure can appear with different symptoms, like pulsating, steady, and unsteady low pressure. For steady low pressure, pump starvation and a loose belt could be the reason behind low pressure.īelow, we look at the different steps to diagnose the low water pressure in your pressure washer. For unsteady low pressure, examine the pump inlet for any air leakage and ensure that your water source supplies enough water. For pulsating low pressure, check the pump for any visible damage. To diagnose low pressure on a pressure washer, you first need to determine the type of pressure you are receiving. How to diagnose low pressure on a pressure washer? Solution 1: Maintenance of your pressure washer.3 How do you fix low pressure on a pressure washer?.Reason 6: Motor malfunction (electric pressure washer only).Reason 4: Hot water in a cold water pump.Reason 3: Air filter (gas pressure washer only).Reason 2: Carburetor problem (gas pressure washer only).Reason 1: Spark plug (gas pressure washer only).2 Why doesn’t my pressure washer have any pressure?.1 How to diagnose low pressure on a pressure washer?.
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