MasterForce MF3N12300 User Manual (English)

Questions and Answers:

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Laura MitchellAug 6, 2025
Why does my MasterForce MF3N12300 Pressure Washer turn on for 2 seconds then shut off?
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  kimberly32Aug 7, 2025
  When the water is connected, the accessories are assembled properly, and the power is turned on, the MasterForce Pressure Washer may turn on for 1 - 2 seconds to prime the pump. It automatically shuts off and waits for the spray gun trigger to be pressed. When the trigger is pressed, water starts flowing through the pump. The water sensor in the pump 'senses' the moving water and automatically turns the pressure washer on. Alternatively, turn the power off, hold in the trigger on the spray gun so that you have a steady stream of water, and while you are holding the trigger open on the spray gun, at the same time, turn the power on.
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Brian BrownAug 13, 2025
What to do if the high pressure hose won't connect to the MasterForce MF3N12300 Pressure Washer spray gun?
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  Jamie BakerAug 13, 2025
  The problem is likely the rubber sleeve covering the fitting at the end of the high pressure hose, which has likely slipped up toward the metal tip. Wiggle, twist, and/or pull the rubber sleeve down until the entire tip is visible plus an 1/8 in. of the metal fitting below the tip. Now try to insert the hose tip into the spray gun. It should “click” into place and will not come out until the hose is released by pushing in the lever on the underside of the gun. If you are unable to move the sleeve down, you may carefully cut away the end of the sleeve with a sharp knife, being careful not to cut or puncture the hose.
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Brian HarveyAug 18, 2025
What to do if my MasterForce MF3N12300 is running but there is no water flow?
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  James Ellis Jr.Aug 18, 2025
  First, remember that power should NOT be turned on until water comes through the spray gun, as doing so will damage the motor. Then: * Check the water source. * Eject the nozzle from the lance to determine if the clog is coming from the nozzle. * Take off the lance and just spray out of the spray gun to see if the problem is with the lance. * Check the Garden Hose Adapter for loose connection and the filter for debris.