Why won't my electric pressure washer turn on at all?

Check the power source first: a tripped GFCI outlet or breaker is the single most common cause, since most electric pressure washers draw 13 to 15 amps and can trip a shared circuit, especially one running other appliances. After confirming power, check that the trigger gun's safety lock is disengaged, since most models won't start with the safety lock engaged.

Why does my gas pressure washer's engine not start?

Common causes include old or stale fuel (gas degrades after about 30 days without a stabilizer), a spark plug that's fouled or disconnected, the choke or fuel valve not set correctly for a cold start, or, on models with this feature, the trigger not being squeezed during pull-start to release built-up pressure that can prevent the pull cord from engaging fully.

Does the trigger gun need to be squeezed to start a pressure washer?

On many models, yes. Both electric and gas pressure washers often require the trigger to be squeezed briefly during startup to release residual pressure in the pump and allow the motor or engine to engage. Check your specific model's manual, but this is a very common step that's easy to overlook.

Can a pressure washer that sat unused all winter fail to start?

Yes, this is extremely common. On gas units, stale fuel left in the tank or carburetor over winter is the most frequent cause. On electric units, it's less about the motor itself and more often a GFCI outlet that's tripped, or, less commonly, pump seals that have dried out and need a priming cycle before the unit builds pressure normally again.

Pressure Washer Not Starting: 6 Causes and Fixes

If your pressure washer won't turn on or the motor won't engage, the problem is usually one of a handful of common issues, not a dead unit. We cover the 6 most common reasons an electric or gas pressure washer fails to start and how to fix each one.

Step-by-Step Guide

Fix 1: Check the power source (electric models)

Confirm the outlet is working and check whether a GFCI outlet or breaker has tripped, this is the most common cause of an electric pressure washer that seems completely dead. Reset the GFCI by pressing the reset button on the outlet, and try a different outlet or extension cord if available to rule out a bad cord.

Fix 2: Disengage the trigger gun safety lock

Most trigger guns have a small safety lock switch that, when engaged, prevents the trigger from being squeezed and can prevent the motor from starting on some models. Check that this lock is in the unlocked position before troubleshooting further.

Fix 3: Squeeze the trigger during startup

Many pressure washers require squeezing the trigger briefly during power-on or pull-start to release residual pressure in the pump. If you're turning the unit on without touching the trigger, try again while holding the trigger down.

Fix 4: Check fuel and spark plug (gas models)

If fuel has been sitting for more than 30 days without a stabilizer, drain it and add fresh gas, stale fuel is one of the most common reasons a gas pressure washer won't start after storage. Check that the spark plug is properly connected and not visibly fouled or corroded.

Fix 5: Verify the choke and fuel valve settings (gas models)

For a cold start, most gas engines need the choke set to the closed or start position and the fuel valve turned on. Once the engine catches, gradually move the choke to the run position. Skipping this step is a common reason for a pull cord that turns the engine over without it actually starting.

Fix 6: Check for a stuck or seized pump after long storage

If the unit sat unused for an extended period, the pump can develop dried seals that create resistance. Try running the unit for a short cycle with water connected, some resistance often resolves itself within the first minute or two as the pump re-primes. If the motor hums but doesn't turn over at all, this may indicate a seized pump needing professional service.

A pressure washer that won't start is one of the more alarming problems to run into, especially right before a planned cleaning job, but it's usually one of a handful of common issues rather than a dead unit.

For electric models, a tripped GFCI outlet is by far the most frequent cause, since these units draw enough amperage to trip a shared circuit under the wrong conditions.

For gas models, stale fuel after a season of storage is the most common culprit, followed by spark plug and choke settings that weren't set correctly for a cold start.

Across both types, an overlooked safety lock or a trigger that needs to be squeezed during startup catches more people than you'd expect.

Start With the Basics

Power source (electric): Check for a tripped GFCI outlet or breaker before assuming a unit problem, this alone resolves a large share of "won't start" cases.

Safety lock: Confirm the trigger gun's safety lock is disengaged, many units won't start or won't build pressure with it engaged.

Trigger during startup: Many models require the trigger to be squeezed while powering on to release residual pump pressure.

Diagnosing Your Specific Problem

Electric unit is completely dead, no sound at all: check the outlet, GFCI reset button, and try a different outlet or cord before assuming a motor failure.

Electric unit hums but the motor doesn't engage: may indicate a seized or stuck pump, especially after long storage, this typically needs professional service if it doesn't resolve within the first minute of running.

Gas engine won't catch on pull-start: check fuel freshness first, then spark plug connection, then choke and fuel valve settings, roughly in that order of likelihood.

Gas engine turns over but doesn't fire: most likely a fouled spark plug or incorrect choke position for a cold start.

Unit worked fine last season, won't start this season: almost always stale fuel on gas units, or a tripped GFCI or dried pump seals on electric units that sat unused over winter.

Quick Diagnosis

Symptom	Most Likely Cause	Fix
Electric unit completely dead	Tripped GFCI or breaker	Reset GFCI, check outlet
Motor hums but won't engage	Seized or stuck pump	Run briefly to re-prime, service if unresolved
Gas engine won't catch	Stale fuel	Drain and replace with fresh gas
Gas engine turns over, no fire	Fouled spark plug or wrong choke setting	Check plug, set choke for cold start
Won't start after long storage	Stale fuel (gas) or tripped GFCI (electric)	Check fuel age; reset GFCI