Pump very noisy or rattling, reduced solution output

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Air in solution line, Worn pump bearings, Debris inside pump chamber, Low water level causing cavitation

Safety: Unplug before removing hoses.

Check water level: Ensure the clean tank is at least half full to prevent air being drawn into the pump.
Bleed air: Run the pump with trigger held open and tool held low until a steady stream appears.
Flush debris: Fill the tank with warm clean water and run through the system to flush the solution pump.
Inspect pump: If noise persists, remove the pump and check for play in the shaft or internal damage. Replace the complete solution pump assembly if worn.

Medium 3/5

Solution Pump Assembly

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