Rainbow Power Nozzle Indicator Light with Lens - D3, D4, D4SE UD70100 A failing board usually shows

A failing board usually shows up as a unit that will not turn on

it maintains the sealed airflow that suction depends on

protecting the internal parts and supporting the brush roll assembly

This genuine SEBO Swivel Neck L/H Bearing is the left-side pivot bearing shared across the X4

Tip: lower the brush strip for hard floors

Rainbow Power Nozzle Indicator Light with Lens - D3, D4, D4SE UD70100 A failing board usually showsThis power nozzle indicator light with lens (Part #R1818B) shows at a glance whether your Rainbow nozzle motor is receiving power, and it fits the Rainbow Rexair D3, D4, and D4SE, model R 1650. The assembly arrives with both the light and its lens, ready to install. Once the bulb burns out or the lens cracks, you lose that quick visual check and cannot tell whether the nozzle is truly powered. That makes troubleshooting a stalled brush roll harder