Rug Doctor digital carpet cleaner display shows LO or LOW, and the solution pump will not run; the vacuum may still operate.

Safety: Turn off and unplug the unit before removing tanks.

• 1. Refill tank: Remove the solution tank, fill it to the indicated level with water and Rug Doctor solution, and reinstall it firmly.
• 2. Check float mechanism: If your model has a visible float inside the tank, ensure it moves freely. Clean any soap residue or debris that may cause it to stick.
• 3. Inspect level sensor: Some models use a magnetic reed switch or micro-switch in the base. Check that the tank is correctly aligned to activate the sensor. Clean the sensor area and reseat the tank.
• 4. Sensor test: With the unit unplugged, access the level sensor wiring and test the switch with a multimeter while moving the float or tank into position. Replace the solution level sensor if it does not change state.

Tip: Do not bypass the low-level sensor; running the pump dry can cause permanent damage.