Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterRotobrush Vent Sanitizing: The Los Angeles Owner’s Guide
If you’re running a Rotobrush system and the vent sanitizing function has quit or is spraying unevenly, we stock the replacement parts and install them for $145 to $385 depending on your model and what failed. Most Los Angeles owners discover the problem the same way: the sanitizer fog comes out weak, the pump makes noise but nothing flows, or the unit trips its breaker mid-job. Roy Castellanos and our techs carry Rotobrush-compatible sanitizing components on the truck across most of LA County, so we can usually diagnose and swap the failed part in one visit.
Which Rotobrush Models This Applies To
The vent sanitizing components we replace sit inside Rotobrush’s aiR+ and BRH series units, plus the older R500 and R2000 platform machines still running in a lot of LA vans. Here’s what matters for matching your part: Rotobrush changed the pump fitting size between the BRH and aiR+ generations, so a pump that fits a 2016 machine will not seal on a 2022 machine without an adapter. Look at the serial plate on the back of your unit. The model prefix before the dash tells you the generation. A BRH-350 takes a different sanitizer pump assembly than an aiR+ 4500, and putting the wrong one on will either leak at the fitting or burn the motor out in a few weeks. We match OEM Rotobrush parts when the unit is under warranty. For out-of-warranty machines, we often recommend a quality aftermarket equivalent that costs 20 to 30 percent less and carries the same 365-Day Done Right Promise from us either way.
Signs Your Rotobrush Vent Sanitizing Is Failing
- Weak or intermittent fog at the nozzle. The pump diaphragm is worn or the intake screen is clogged with dried sanitizer residue. This is the most common failure we see on LA units that sit in hot vans between jobs, since the solution thickens at high temperatures and strains the pump on startup.
- Pump runs but nothing sprays. The pickup tube has cracked or the check valve inside the pump head is stuck. Rotobrush’s older R-series units used a rubber check valve that degrades after about 700 to 1,000 cycles.
- Sanitizer leaking from the bottom of the housing. The o-ring at the reservoir cap has flattened out. Cheap fix on most models, but if it’s been leaking onto the motor housing, the corrosion can take the motor with it.
- Breaker trips when the sanitizer switch is engaged. The pump motor windings are shorting. This is an electrical failure and not something to keep resetting. A shorted pump can damage the main control board if it’s allowed to arc repeatedly.
- Burnt smell from the pump area. The motor is running dry because the reservoir ran empty during a job. The impeller overheats and the housing warps. At that point, replacement is cheaper than repair.
Replacement Cost & What’s Included
Here’s what Los Angeles owners actually pay for Rotobrush vent sanitizing repair, parts and labor together:
- Reservoir o-ring and cap assembly: $35 to $65 installed
- Pickup tube and check valve replacement: $55 to $95 installed
- Sanitizer pump assembly (aftermarket equivalent): $145 to $225 installed
- Sanitizer pump assembly (OEM Rotobrush): $185 to $285 installed
- Pump plus motor replacement (severe failure): $285 to $385 installed
The range depends on whether your unit needs just the pump head or the whole motor assembly, and whether we’re installing OEM or a matched aftermarket part. The price we quote is written down before we touch anything, and it does not move. Every replacement carries the 365-Day Done Right Promise: if the part fails within a year, we come back and make it right at no charge, including the second visit.
DIY or Call Us?
You can safely check two things yourself: whether the reservoir has solution in it, and whether the pickup tube has visible cracks at the connection point. Both take five minutes and require no tools. What you should not do is open the pump housing on a plugged-in unit or try to replace the motor yourself. The sanitizer pump on Rotobrush machines runs on 110V and a shorted motor will arc if it fails while you’re handling it. We’ve also seen DIY replacements where the pump was installed with the wrong o-ring size, and the first job after the “fix” sprayed sanitizer into the operator’s face. For anything beyond a visual check, call (361) 326-5060 and we’ll diagnose it properly.
FAQs
On Los Angeles job volumes, the pump diaphragm and check valve typically last 2 to 4 years before they lose pressure. Units stored in enclosed vans through a San Fernando Valley summer tend to fail on the earlier end because the heat hardens the rubber components faster.
The check valve and o-rings can be replaced individually if the motor is still strong and the housing isn’t warped. Once the motor windings fail or the housing deforms from dry-running, repair costs more in labor than a new assembly. Call (361) 326-5060 and we’ll tell you which situation you’re in.
A pump and check valve replacement takes 45 minutes to an hour on most Rotobrush models. A full motor assembly replacement runs closer to 90 minutes. Either way, it’s a one-visit job.
We carry the common failure parts for Rotobrush aiR+, BRH, and R-series units on our service vehicles across Los Angeles: o-rings, check valves, pickup tubes, and both OEM and aftermarket pump assemblies. We’re an independent service provider and not affiliated with Rotobrush, which means we’re not locked into their parts network or their pricing structure. We also stock vent sanitizing parts for Lennox, Trane, and Carrier systems when those come through the door.
Written by Roy Castellanos, Owner, Hollis Air Duct Cleaning at Hollis Air Duct Cleaning, serving Los Angeles and nearby areas.