When a Rainbow power nozzle quits in the middle of a room and the little red button has popped out, you are looking at the circuit breaker. This is the genuine 2.5 amp Rexair replacement breaker for Rainbow power nozzles, the part that trips to protect the nozzle motor when the brush roll binds. It is a few-minute swap that gets a working machine back in service instead of sending it out for repair.
Built for
- A power nozzle that stops running with the red reset button popped out
- A breaker that will no longer hold a reset even with the brush roll clear
- Older D-series machines still running the superseded R-4291 Littelfuse breaker
- Vacuum repair shops that keep fast-moving Rainbow parts on the shelf
- Owners who would rather do a five-minute part swap than book a service visit
Compatibility is unusually wide for a part this small. It covers Rainbow power nozzles from the D3 forward, including D3A, D3C, D4C and D4C-SE, the E and E2 single-speed units in the 9,000,000 serial range, the E2 two-speed range, and the PN-2E, PN-3, and PN-3A nozzles. That span is why repair shops stock it: one part number covers most of the installed base.
Before you replace anything, do the diagnosis in the right order. A tripping breaker is usually reporting a problem rather than being the problem. Thread, hair, or carpet fiber wrapped around the brush roll is the most common cause, and clearing it plus checking the belt fixes most cases. Only when the nozzle is clear and the breaker still will not hold is the breaker itself the failed part. A shorted trigger switch in the handle can mimic the same symptom, so if a new breaker trips just as fast, look at the trigger next. One note on current production: this switch now ships without the washer and nut, so keep the hardware from the old breaker when you take it out.
Specifications
- Part number: R8452B, also listed as R-8452 and R8452; supersedes R4291
- Rating: 2.5 amps
- Reset: Manual push-to-reset red button
- Fits: Rainbow power nozzles from D3 forward, including D3A, D3C, D4C, D4C-SE, E, E2, PN-2E, PN-3, PN-3A
- Included hardware: Switch only; reuse the washer and nut from the breaker you remove
- Brand: Rexair Rainbow, genuine part
Frequently asked questions
My power nozzle stopped and a red button popped out. Is this the part?
Most likely. Press the button to reset it first. If the nozzle runs again and stays running, the breaker did its job. If it will not hold a reset, the breaker is the part to replace.
Will it fit an older D-series Rainbow?
Yes. Documented compatibility runs from the D3 forward, and it replaces the older R-4291 breaker used on machines like a D4C.
Why does my breaker keep tripping?
Usually because something is binding the brush roll. Check for thread, hair, and carpet fiber wrapped around the roll and verify the belt before replacing the breaker.
Does the new breaker come with a washer and nut?
Current production ships the switch only. Save the washer and nut from the old breaker when you remove it.
A new breaker trips immediately. What else could it be?
A shorted trigger switch in the handle produces the same symptom. Testing the nozzle with the trigger circuit bypassed is the standard way to tell the two apart.
Discount Cleaning Products is an authorized dealer for the commercial cleaning and surface-prep brands we carry, with US-based support from people who work with these machines every day. If you are unsure whether this part matches your model, send us the model and serial number off the data plate and we will confirm the fit before you order.
