Easy to install: 1. Turn off the power supply. 2. Remove the front panel, then move the control switch to the “OFF” position. 3. Drain the water tank. A) On KM-320M_H, KM-515M_H, KM-600M_H, KM-650M_H, and KM 901M_H, remove the base cover, then disconnect one end of the pump tubing to drain the water tank (See Fig. 1). After the water tank has drained, reconnect the pump tubing. B) On KM-1340M_H and KM-1601M_H, remove the rubber cap covering the overflow pipe in the water tank. Remove the overflow pipe by turning it counterclockwise. After the water tank has drained, replace the overflow pipe and the rubber cap in their correct positions. Note: Be sure the overflow pipe o-ring is in its correct position on the overflow pipe. 4. Disconnect the vent tube and the flush tube from the top of float switch, then remove float switch assembly and remove the old rubber boot from the bottom of float switch assembly (See Fig. 2). Discard the old rubber boot. 5. Remove the retainer rod from the bottom of float switch housing, then remove the float. Be careful not to bend the retainer rod excessively when removing it. 6. Wipe down float switch housing, shaft, float, and retainer rod with a mixture of 1 part “ScaleAway” and 25 parts warm water. Clean the inside of the new rubber boot and hose with cleaning solution. Rinse the parts thoroughly with clean water. 7. Reassemble float switch assembly and replace it and the new rubber boot in their correct positions. Reconnect the vent tube and the flush tube. 8. Move the control switch to the “ICE” position. 9. Replace the base cover (if applicable) and front panel in their correct positions. 10. Turn on the power supply to start the automatic icemaking process.