Why is my pressure washer shutting off?

Asked By: Qiaoli Wohlleber | Last Updated: 2nd March, 2020
Category: home and garden home appliances
4.7/5 (2,952 Views . 34 Votes)
Sometimes, pressure washer shuts off due to the problem with the O-rings. Your unloader valve has O-rings that are generally known as washer or seal. If the O-rings are torn out, deteriorated, or in a poor state that is not enough to seal the oil pump, it may fail your unloader valve to work properly.

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Also to know is, how do you turn off a pressure washer?

Shut down the pressure washer: Shut off engine and let cool. Turn off water supply. Relieve the pressure in the system: Press and hold spray-gun trigger until all water remaining in the line is expelled. Disconnect high-pressure and garden hoses from pump, and detach high-pressure hose from spray gun.

Beside above, why does my pressure washer dies when trigger released? If your pressure washer shuts off when the trigger is released, it has a problem with the unloader valve. There are a few issues with your unloading valve that causing stalling the engine pump. Troubleshooting of this problem is pretty simple and you can do it yourself easily.

In this way, why does my power washer keep surging?

Water flow may be restricted to the pressure washer. Check that all hoses are free of kinks, leaks, or blockage. If the nozzle has even a little bit of dirt in the tip, it may cause enough obstruction for the pressure washer to pulsate.

How long can you run a pressure washer without water?

For this reason you should not let your pressure washer idle, not spraying water for more than a few minutes. Without cooling the pump head the temperature will begin to climb to 200+ degrees. When it gets that hot, water seals and o-rings soften and wear quickly. Valves can be distorted and warp.

32 Related Question Answers Found

How long can you run a pressure washer?

To avoid damaging the pump: Never run a washer longer than three to five minutes (depending on the model) while the trigger is off. With the washer running and the trigger locked “off,” adjust pressure and spray settings, or insert nozzle tips in the spray wand. Now the washer is ready to use.

Can expandable hoses be used with pressure washers?

Yes and no… The manufacturers guidelines stipulate that you shouldn't use the XHose product with a pressure washer. An Xhose is a unique hose designed for compact storage and large amounts of length and anti-kink properties.

What does a pressure washer unloader valve do?

Pressure Washer Unloader / Regulator Valves. An unloader valve is the component of a pressure washer that allows the pump to bypass the flow of water back to the pump while the spray gun is not being used. Most unloader valves also act as a pressure regulator for the output pressure of the pump.

How do I pressure wash without a pressure washer?

How to wash your house: If mildew is present, use a solution of 1 quart of bleach to ¾ gallon of water and a small amount of the TSP detergent. (Paint dealers also sell mildewcide that can be used to clean wood siding.) Turn off the power to any outside lights that could get wet.

Can you paint with a pressure washer?

Pressure washing is one way to remove paint from wood, metal, concrete, and other exterior surfaces. Selecting a pressure washer with a range of 2,000 PSI to 4,000 PSI will give you the most effective power for removing peeling paint. As with all power equipment, always wear safety glasses and closed toe shoes.

What can you use a pressure washer for?

The Top 10 Pressure Cleaner Uses:
  • Driveways and garage floors.
  • Concrete or tile patios.
  • Front entrance stairs and walkways.
  • Wood decks.
  • Home exteriors that are vinyl or brick.
  • Fencing.
  • Cars and Trucks.
  • Miscellaneous gear like lawn mowers, dirt bikes, boats or trailers.

How do I fix my pressure washer surging?

How to Troubleshoot a Surging Pressure Washer
  1. Remove the nozzle and clean it with a nozzle cleaning kit. You may have a partially plugged spray nozzle.
  2. Check the unloader and repair or replace it.
  3. Check the inlet hose and filter.
  4. Secure an adequate water supply.
  5. Inspect valves and clean or replace them as needed.

Why is my pressure washer pulsing?

My Pressure Washer Is Pulsating
This issue is almost always caused because of a dirty inlet or discharge valve. If your inlet and discharge valves are clean, then the plunger is the likely the cause of the pulsating, especially if you have low pressure while this is happening.

Why does my pressure washer sputter?

If your engine sputters out soon after starting and will not idle, the carburetor may need adjusting or be clogged and in need of cleaning. The carburetor mixes fuel from the gas tank with air before injecting it into the combustion chamber. This can cause the engine to sputter out, especially when idling.

Why is my pressure washer overheating?

This is usually caused by a thermal relief valve which is installed to prevent the pump from overheating. The water in the washer gets trapped and fresh cool water cannot enter. To release this water pull the trigger after about every minute. Overheating can cause permanent damage to your pump.

Why is my pressure washer not building pressure?

When a pressure washer has no pressure, the natural instinct for most operators is to check the pump or the unloader valve. The classic rookie mistake is to crank the unloader knob down until pressure is restored. The unloader valve is not the correct way to change the pressure output of your machine.

What causes pressure washer pump failure?

The two most important issues concerning breakdowns of pressure washer pump are cavitation and overheating due to excessive time in by-pass. Cavitation is caused when there is not enough water supplied to the pump. It is easy for the person a pressure washer to be distracted by something.

How do you adjust a pressure washer unloader valve?

How to Set the Unloader Valve or Pressure Regulator
  1. Make sure the engine or motor is spinning at the proper rpm.
  2. Use a new high power washer spray nozzles of the proper size orifice for your pressure washer.
  3. Remove the nylock nut off the top of the unloader valve and spin the black plastic pressure adjusting knob off.

How does a pressure washer unloader valve work?

A pressure washer unloader valve diverts the water flow through the bypass when the trigger on the gun is depressed. The trigger shuts off the water flow, causing the unloader valve to re-circulate the water back to the header tank or alternatively back to the inlet side of the pump.

How loud is a gas pressure washer?

All the gas pressure washers produced at least 85 decibels (dBA), the threshold at which we recommend hearing protection. Electric models averaged 78 dBA when running and are silent with their triggers released, since doing so stops the motor.

How does a pressure washer work diagram?

A typical pressure washer has either a gas-fueled engine or electrical powered motor that powers a water pump. The pump accelerates the water, supplied from a garden hose, to produce high pressure. When the trigger is pulled, the water mixes with the air and comes out of the nozzle.

What does a pulse hose do on a pressure washer?

Pulse hose is a specially manufactured hose that, unlike typical hose, will expand slightly to dissipate energy. The energy dissipation quality decreases momentary pressure spikes and smooths flow and performance. Each compression cycle of the pump creates a pressure spike and then no pressure.