Hotsy 790SS - User Manual

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8.914-355.0

SERIAL NUMBER:

DATE PURCHASED:

FOR SALES AND SERVICE, PLEASE CONTACT:

OPERATING INSTRUCTIONS

AND PARTS MANUAL

Read instructions carefully before attempting to assemble, install, operate or service this pressure

washer. Failure to comply with instructions could result in personal injury and/or property damage!

MODELS 790SS, 795SS,

795SS-208, 895SS

Table of Contents

Questions and Answers

S
Shawn PorterAug 3, 2025
What to do if the Hotsy 790SS burner will not ignite when the trigger gun is open?
- S
  Stephen BushAug 3, 2025
  If the burner won't ignite, the pressure switch might be defective, so replace it. Check if there's no fuel and fill the fuel tank with the proper fuel if needed. Ensure the fuel valve on the fuel tank is open. If the thermostat is set too low, raise the thermostat setting. Also, the burner motor reset button might be tripped, so push it and check for proper voltage. Lastly, a clogged fuel filter can cause this, so clean the fuel filter.
B
Brian MorganAug 9, 2025
How to fix a Hotsy Pressure Washer when no water sprays from the water nozzle?
- Y
  yangrichardAug 9, 2025
  If no water sprays from the nozzle, it could be completely clogged, so clean it. Another cause might be a clogged inlet water screen, so check and clean it if necessary. The pump could also be sucking air, so fill the detergent container and check for loose hose clamps or fittings.
C
Christopher ChapmanAug 15, 2025
Why won't my Hotsy Pressure Washer pump motor run?
- R
  Ray RichardsAug 15, 2025
  There are several reasons why the pump motor won't run. It could be due to a tripped GFCI, in which case you should reset and test the GFCI. Another cause might be no voltage to the machine, so test the power supply. Also, the pump motor reset button might be tripped, so push the reset button on the control box, and check for proper voltage or a clogged water nozzle. Finally, excessive pressure from a clogged water nozzle can cause this issue, so clean the water nozzle.
K
Keith OnealAug 21, 2025
What to do if my Hotsy 790SS Pressure Washer has low pressure from the water nozzle?
- D
  David FordAug 21, 2025
  If you're experiencing low pressure, the inlet water screen might be clogged, so check and clean it. The water nozzle could be worn or the incorrect size, so replace it with the proper size. Also, ensure that the water supply isn't low, and correct it if it is. Finally, the pump might be sucking air, so fill the detergent container and check for loose hose clamps or fittings.
T
thomas73Aug 27, 2025
What to do if my Hotsy 790SS has poor or no detergent flow?
- J
  Jessica RogersAug 27, 2025
  If you're experiencing poor or no detergent flow, make sure the detergent level isn't low by filling the detergent container. The detergent screen might be clogged, so clean it. Also, check that the detergent valve is opening and that the handle or knob isn't slipping on the shaft. A clogged water nozzle can also cause this, so clean the water nozzle. Finally, excessive inlet pressure (more than 80 PSI) can be the cause, so install a pressure regulator on the inlet line.

Summary

Important Safety Information

Owner;User Responsibility

User's understanding of instructions and warnings before operation.

Assembly Instructions

Unpacking

Steps for carefully unpacking the pressure washer and checking parts.

Pressure Hose, Trigger Gun and Wand

Instructions for connecting the pressure hose, trigger gun, and wand.

Installation Instructions

Venting

Guidelines for proper venting of burner exhaust gases.

Burner Air Adjustment

Procedure to adjust the burner air band for optimal performance.

Operation Instructions

Electrical Connections

Instructions for connecting the power cord and testing the GFCI.

To Start

Step-by-step guide to starting the pressure washer.

To Stop

Steps for safely shutting down the pressure washer.

General Cleaning Techniques & Storage

Cleaning Techniques

Methods for pre-rinsing, applying detergent, and rinsing.

Storage

Instructions for protecting the machine from freezing and long-term storage.

Maintenance

Pump Motor

Instructions for oiling the pump motor annually.

Burner Fuel Filter

Guidance on draining and cleaning the fuel filter.

Heating Coil

Information on coil descaling and desooting.

Troubleshooting

Pump Motor Will Not Run

Troubleshooting steps for when the pump motor does not run.

No Water Sprays From Water Nozzle

Causes and solutions for no water spraying from the nozzle.

Low Pressure From Water Nozzle

Troubleshooting steps for low water pressure.

Burner Will Not Ignite When Trigger Gun Is Open

Troubleshooting steps for burner ignition failure.

Exploded View - Left Side

Exploded View - Right Side

Exploded View Parts List

Control Panel Assembly, 790 SS, 795 SS, 795 SS-208

Wiring Diagram- 790 SS, 795 SS

Summary

Important Safety Information

Owner;User Responsibility

User's understanding of instructions and warnings before operation.

Assembly Instructions

Unpacking

Steps for carefully unpacking the pressure washer and checking parts.

Pressure Hose, Trigger Gun and Wand

Instructions for connecting the pressure hose, trigger gun, and wand.

Installation Instructions

Venting

Guidelines for proper venting of burner exhaust gases.

Burner Air Adjustment

Procedure to adjust the burner air band for optimal performance.

Operation Instructions

Electrical Connections

Instructions for connecting the power cord and testing the GFCI.

To Start

Step-by-step guide to starting the pressure washer.

To Stop

Steps for safely shutting down the pressure washer.

General Cleaning Techniques & Storage

Cleaning Techniques

Methods for pre-rinsing, applying detergent, and rinsing.

Storage

Instructions for protecting the machine from freezing and long-term storage.

Maintenance

Pump Motor

Instructions for oiling the pump motor annually.

Burner Fuel Filter

Guidance on draining and cleaning the fuel filter.

Heating Coil

Information on coil descaling and desooting.

Troubleshooting

Pump Motor Will Not Run

Troubleshooting steps for when the pump motor does not run.

No Water Sprays From Water Nozzle

Causes and solutions for no water spraying from the nozzle.

Low Pressure From Water Nozzle

Troubleshooting steps for low water pressure.

Burner Will Not Ignite When Trigger Gun Is Open

Troubleshooting steps for burner ignition failure.

Exploded View - Left Side

Exploded View - Right Side

Exploded View Parts List

Control Panel Assembly, 790 SS, 795 SS, 795 SS-208

Wiring Diagram- 790 SS, 795 SS

Hotsy 790SS Specifications

General

Model	790SS
Category	Pressure Washer
Pressure	3000 PSI
Flow Rate	3.5 GPM
Thermal Relief Valve	Yes
Hose Length	50 ft
Pump	Triplex

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