Pressure Washer Keeps Tripping Breaker? Causes and Fixes

Quick answer: If your electric pressure washer keeps tripping breaker after breaker, first work out which device is cutting the power. A tripped panel breaker usually means the circuit is overloaded, often by another appliance, an extension cord or a power strip. A tripped GFCI on the plug or outlet is a safety device reacting to a possible ground fault, and repeated GFCI trips mean stop and get it checked.

This only applies to corded electric washers. A gas pressure washer has its own engine and isn’t plugged into your house wiring, so it can’t trip a household breaker.

Electricity and a machine that sprays water is a combination I’d treat with real respect. So the order below starts with the safe, simple checks and ends with knowing when to stop.

Why a Pressure Washer Keeps Tripping Breaker or GFCI

When I lined up Sun Joe’s GFCI guide, Ryobi’s troubleshooting page and the CPSC’s GFCI fact sheet, the causes fell into two groups: too much load on the circuit, or current leaking where it shouldn’t. Here they are, most likely first.

1. Another appliance on the same circuit. Ryobi’s support team says its high-powered motor may trip the mains circuit breaker if another high-powered appliance is running at the same time.
2. An extension cord or power strip. Ryobi says power boards (power strips) may reduce performance and cause tripping, and that long or multiple extension leads cut motor power. Sun Joe says its manuals may recommend plugging straight into the outlet.
3. Moisture in the plug, cord or outlet. The CPSC defines a ground fault as an unintentional electrical path between a power source and a grounded surface. Water in the wrong place can create one.
4. A damaged cord, plug or GFCI. The CPSC says ground faults most often happen when equipment is damaged or defective. Sun Joe treats worn insulation or a cracked GFCI housing as a reason to stop using the machine.
5. An internal electrical fault. If the GFCI won’t reset or trips again immediately with a dry cord and a known-good outlet, the problem may be inside the washer.

A related look-alike: Ryobi notes its washers can stop during long jobs because the motor’s thermal overload switch activates. That shuts the motor off without tripping anything in your panel.

First, Breaker or GFCI?

This one check tells you which half of the guide you need.

• The panel breaker is off. Go to your electrical panel. A breaker sitting in the tripped position points to an overloaded circuit, so start with Fix 1 and Fix 2.
• The GFCI is off. Many electric pressure washers have a GFCI built into the plug, often with a RESET button and an indicator light. Outdoor and garage outlets often have their own; the CPSC notes the electrical code has called for GFCI protection on outdoor receptacles since 1973 and garages since 1978. A tripped GFCI points to a possible ground fault, so start with Fix 3.

One wrinkle: some panels use GFCI circuit breakers. The CPSC says those protect against both a ground fault and a circuit overload, so a tripped breaker with a TEST button on it could be either.

My take: don’t skip this step. Resetting the wrong thing over and over wastes an afternoon, and repeatedly resetting a GFCI without asking why is the one habit I’d break.

How to Fix It

Fix 1: Give the Washer Its Own Circuit

Turn off or unplug anything else running on that circuit. In practice, it’s the first thing I’d rule out. A freezer in the garage, a shop vac, a space heater or a compressor can all share an outdoor outlet’s circuit without you knowing.

Ryobi’s advice is to check the circuit breaker at your electrical panel and make sure no other high-powered appliance is running at the same time. If the washer only trips the breaker when something else is on, you’ve found it.

Fix 2: Lose the Extension Cord and Power Strip

Plug the washer straight into the outlet. I know, the outlet is never where you want it to be. Ryobi advises against power boards, and Sun Joe’s troubleshooting tells owners to remove any extension cord and try the washer directly from the outlet.

If your manual permits an extension cord, use only an outdoor-rated cord of the length and wire gauge it specifies. Sun Joe puts it plainly: “Never assume that one extension-cord specification applies to every pressure washer.” Ryobi’s Australian guidance, for example, is one outdoor-rated lead no longer than 25 m.

Fix 3: Reset the GFCI Safely

Sun Joe’s reset procedure, in order:

1. Inspect the power cord and plug. Confirm they’re dry and undamaged. Don’t use the washer if the insulation, plug or GFCI housing is worn, cracked or damaged.
2. Connect to the proper outlet. With dry hands, plug into a properly grounded outlet or circuit with GFCI protection. Keep the plug and connections dry and off the ground.
3. Press RESET. Press it until the power indicator lights. Sun Joe says not to hold it for a timed period unless your plug’s own instructions say so.
4. Start the washer. Connect the water and purge air as your manual describes, then switch on.

If the indicator stays off, Sun Joe says to switch off and unplug, confirm the outlet works and supplies the voltage on the rating label, remove any extension cord, and try RESET again.

Fix 4: Dry Everything Out

Honestly, wet connections are where I’d look first. If the GFCI trips after you’ve been spraying near the outlet, unplug the washer and let the plug, cord ends and outlet dry. Then aim your work away from them.

Here’s why it matters. The CPSC says a GFCI trips when the current leaving and returning differs by as little as 0.006 amperes, faster than the blink of an eye.

That sensitivity is the point. Sun Joe’s safety notes are worth repeating:

• never touch the washer, plug or outlet with wet hands
• don’t stand in water while connecting or running it
• keep the power cord away from heat, sharp edges and the spray
• never spray electrical equipment, outlets, plugs or wiring

When to Call a Technician

Stop using the pressure washer and contact the manufacturer if the GFCI won’t reset, trips again right away, or keeps tripping with a dry cord on a known-good outlet. That’s Sun Joe’s own instruction, and I’d apply it to any brand.

Never bypass, remove or modify the GFCI, the plug or the cord to make the tripping stop. Sun Joe warns against all three. My view is simple: that GFCI is the device standing between you and a shock while you’re holding a wet trigger.

Call a licensed electrician if the outlet or breaker trips with other tools too, if an outdoor outlet has no GFCI protection, or if you see scorch marks, melted plastic or a burning smell at the outlet. While you’re at it, the CPSC recommends testing every GFCI at least once a month and after a power failure.

If your washer runs fine but the hose connections leak, see is a garden hose 3/4 NPT for how hose threads seal. More cleaning gear guides are in our pressure washers section.

Frequently Asked Questions

Why does my electric pressure washer trip the GFCI?

A GFCI cuts power when it detects a ground fault. Moisture in the plug, cord or outlet, or a damaged cord, are common reasons. If it trips again with everything dry, stop using it and contact the manufacturer.

Can a pressure washer trip a breaker on startup?

It can if the circuit is already loaded. Ryobi says its high-powered motor may trip the breaker when another high-powered appliance runs at the same time. Give the washer its own circuit.

Can I use an extension cord with an electric pressure washer?

Only if your manual allows it, and only an outdoor-rated cord of the specified length and gauge. Sun Joe says its manuals may recommend plugging directly into the outlet.

Why does my pressure washer stop but the breaker stays on?

It may be the motor’s thermal overload protection. Ryobi says the overload switch can activate after extended use. Let the motor cool, then restart.

Can a gas pressure washer trip a breaker?

No. A gas pressure washer runs on its own engine and isn’t plugged into your home’s circuits.

Last updated: November 10, 2026. Sources: Sun Joe: using and resetting the GFCI on an electric pressure washer, Ryobi: pressure washer stops during use and CPSC fact sheet: what is a GFCI? (PDF).