This guide provides general troubleshooting steps for Sun Joe® corded electric pressure washers. Whether your unit won't start, has low pressure, is leaking water, or isn't dispensing detergent, follow the troubleshooting section that matches your issue.
These troubleshooting steps apply to the electric pressure washer models covered by this guide. Some components and accessories may vary by model.
Models Covered + Power Type
Before You Begin
Troubleshooting by Symptom
No Power / Unit Will Not Start
Please follow the steps below to troubleshoot your pressure washer and check if it starts working again.
- Unplug the unit before checking connections.
- Confirm water is connected and turned ON.
- Remove any spray nozzle or foam cannon and make sure to clean the nozzles using the needle clean-out tool.
- Hold the trigger for 30 seconds until the water flow is steady to purge air and release trapped pressure.
- Reset the GFCI plug. Plug the unit in, then check the GFCI plug for a red or green indicator light, which confirms that it is receiving power.
- Attach a colored nozzle or set the wand to high pressure (except black nozzle).
- Press and hold the trigger while powering on.
- Allow the unit to cool for 5 minutes if it may have overheated.
GFCI Tripping on Pressure Washers
Most electric pressure washers do not have an internal fuse that can be serviced by the customer. The GFCI plug acts as the unit's circuit protection.
Before Troubleshooting
Make note of the following details:
- Which pressure washer model is affected?
- Does the GFCI trip immediately when the unit is turned on, or only after it has been running for some time?
- Is the unit plugged directly into a wall outlet or connected through an extension cord?
- Are any other devices connected to the same outlet or circuit?
Try a Different Outlet
- Turn the pressure washer OFF and unplug it.
- Remove any extension cord and disconnect other devices from the outlet.
- Plug the pressure washer directly into a different wall outlet.
- Reset the GFCI plug and test the unit again.
Low Pressure or No Pressure
- Remove the nozzle or foam cannon.
- Hold the trigger until pressure stabilizes.
- Clean the spray tip or wand opening.
- Clean the water inlet filter.
- Confirm the unit is not in soap or foam mode.
Pressure Pulsating or Surging
- Use a minimum ½-inch diameter garden hose.
- Straighten any hose kinks.
- Turn the water supply fully ON.
- Clean the nozzle, foam cannon, and inlet filter.
- Hold the trigger until pressure stabilizes.
Unit Turns On and Off by Itself
This can be normal operation. Sun Joe® pressure washers use a Total Stop System that shuts the motor off when the trigger is released and restarts it when the trigger is pulled.
If the unit cycles continuously without using the trigger, check the following:
- Check for leaks.
- Check for loose connections.
Detergent or Foam Will Not Dispense
Use this section if detergent or foam is not dispensing from your pressure washer. First, choose the setup you are using: a foam cannon or the black soap nozzle / low-pressure detergent setting.
Foam Cannon
Follow these steps if you are using a foam cannon and soap is not dispensing.
- Make sure the foam cannon bottle has detergent inside.
- Use pressure-washer-safe detergent only. Do not use household cleaners, bleach, acids, solvents, or other chemicals.
- Dilute the detergent correctly: 1 part soap to 10 parts water.
- Remove the foam cannon bottle cap, then reattach it securely.
- Remove the stainless steel lance from the trigger gun.
- Insert the transfer adapter (if available) into the trigger gun and twist it until it locks.
- Align the foam cannon with the adapter, push it in, and twist it to lock it into place.
- Rotate the adjustable cap to increase the soap volume.
- Adjust the foam cannon nozzle between fan spray and pencil jet.
- Turn the pressure washer on and test if soap starts dispensing.
- If soap was left in the bottle or system after the last use, rinse the bottle and try again with fresh pressure-washer-safe detergent.
Black Soap Nozzle / Low-Pressure Detergent Setting
Follow these steps if you are using the black soap nozzle or your model's low-pressure detergent setting and detergent is not dispensing.
- Make sure you are using the black soap nozzle or the correct low-pressure detergent setting for your model.
- Use pressure-washer-safe detergent only.
- Dilute the detergent correctly: 1 part soap to 10 parts water.
- If you are not using the correct nozzle or setting, switch to the black soap nozzle or low-pressure detergent setting.
- Check whether the detergent tube is loose, kinked, or blocked.
- Inspect the pickup tube or detergent path for any blockage.
- Make sure the detergent tube is seated securely.
- Turn the pressure washer on and test if detergent starts dispensing.
Stiff Quick-Release Nozzle Connector
If the quick-release nozzle connector is difficult to operate, the collar may be affected by corrosion, dirt, or debris buildup.
- Soak the quick-disconnect end in warm, soapy water.
- While the connector remains submerged, move the collar back and forth repeatedly until it begins to operate more smoothly.
- Remove the connector from the water and rinse it by spraying a strong, steady stream of clean water into the quick disconnect to help flush out any remaining dirt or debris.
- Test the collar movement. Repeat the soaking, movement, and rinsing process as needed until the collar moves freely.
Water Leaking / No Water Output
Water Leaking
Check the garden hose adapter first.
- The aluminum end screws onto the pressure washer.
- The colored plastic end connects to the garden hose.
If leaking continues:
- Check all hose, wand, and trigger gun connections.
- Inspect all visible O-rings for damage or missing seals.
- Water leaking from the bottom of the unit requires support assistance.
Motor Runs but No Water Comes Out
- Confirm the water supply is ON.
- Reinstall the garden hose adapter correctly.
- Clean the inlet filter.
- Remove and clean the spray tip or foam cannon.
- Allow frozen components to thaw completely.
Important Storage Reminder
Common Questions
Why won't my Sun Joe pressure washer start?
Check the No Power / Unit Will Not Start section for water supply, trapped air, nozzle blockage, GFCI reset, and cooling checks.
Why does my Sun Joe pressure washer have low pressure or keep pulsing?
See Low Pressure or No Pressure and Pressure Pulsating or Surging for the inlet filter, water supply, hose kinks, spray tip, and air-purge checks.
Why does my Sun Joe pressure washer turn off when I release the trigger?
On models equipped with the Total Stop System, stopping when the trigger is released and restarting when it is squeezed is normal. Continuous cycling without trigger use can indicate a leak or loose connection.
Why won't my Sun Joe pressure washer dispense soap?
Open Detergent or Foam Will Not Dispense and choose the foam cannon or low-pressure soap setting instructions appropriate to your setup.
What if the GFCI keeps tripping?
Stop using the pressure washer if the GFCI trips repeatedly. Do not bypass the GFCI or attempt electrical repairs. Review the GFCI Tripping section for the safety guidance.
Applicable Models
This guide covers the Sun Joe® corded electric pressure washer models listed below. The same general troubleshooting steps apply across these units. You do not need to select a model to follow the instructions. Features and accessories may vary by model.
View Applicable Model Numbers
These model numbers are included to help identify the pressure washers covered by this guide.
- SPX1050
- SPX1500
- SPX1500-RM
- SPX1501
- SPX1501-RED
- SPX1501-SJB
- SPX160E-MAX
- SPX1650
- SPX1700-4X4
- SPX2000
- SPX2002-MAX
- SPX2003
- SPX2003-BLK
- SPX2003-BLK-RM
- SPX2003-GRY
- SPX2003-RED
- SPX2003-RED-RM
- SPX2003-RM
- SPX2003-SJB
- SPX2003-SJH-RED
- SPX2003-SJH-SJB
- SPX2003-SJH-SJG
- SPX2005P
- SPX2005P-RED
- SPX2005P-SJB
- SPX200E
- SPX200E-RM
- SPX201E
- SPX202E
- SPX205E
- SPX205E-MAX
- SPX205E-RM
- SPX205E-XT-RM
- SPX206E
- SPX2500
- SPX2596-BLK
- SPX2596-RED
- SPX2596-SJB
- SPX2596-SJG
- SPX2597
- SPX2597-MAX
- SPX2598
- SPX2598-ELT
- SPX2598-ELT-RM
- SPX2598-MAX
- SPX2598-MAX-RM
- SPX2598-RM
- SPX2599-MAX
- SPX2600-RED
- SPX2600-SJG
- SPX2690-MAX
- SPX2690-SJG
- SPX2700-MAX
- SPX2700-MAX-RM
- SPX2990-BLK
- SPX3000
- SPX3000-PK1
- SPX3001
- SPX3001-RM
- SPX3160
- SPX3160P-SJG
- SPX3200
- SPX3220
- SPX3500
- SPX3500-RM
- SPX3501
- SPX3501-RM
- SPX3550
- SPX4000
- SPX4000-PRO
- SPX4000-RM
- SPX4001
- SPX4001-PRO
- SPX4001-PRO-RM
- SPX4001-RM
- SPX4003
- SPX4003-ELT
- SPX4003-ELT-RM
- SPX4003-RM
- SPX4003-ULT
- SPX4004-MAX-RM
- SPX4300
- SPX4301-MAX
- SPX4500
- SPX4500-RM
- SPX4501
- SPX4600
- SPX4600-MAX
- SPX4600-RM
- SPX4601
- SPX7000E
- SPX7000E-SJB
- SPX7000E-SJG
Escalation Path
If the issue continues after completing the correct troubleshooting section, contact Shop Joe Customer Support. Have the pressure washer model number, serial number, attachment being used, whether the GFCI trips immediately or after some time, and details about what happened during troubleshooting ready.