Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Rotobrush Coil Cleaning: The Yonkers Owner’s Guide
If your Rotobrush system isn’t pulling the way it used to, the coil is usually the culprit. We stock Rotobrush-compatible coil cleaning parts at our Yonkers shop and typically install them same-week, with most jobs running $145 – $285 including the part and labor. Owners usually discover the problem mid-job: the brush slows down on long duct runs, or the machine starts tripping its thermal overload because the coil can’t deliver clean power to the motor anymore.
You don’t need to replace the whole machine. In most cases, the coil is a serviceable component on Rotobrush units, and swapping it brings the system back to full performance. Omar Haddad and our Yonkers crew see this exact failure pattern regularly, especially on older R500 and early iSeries units that have logged heavy seasons.
Which Rotobrush Models This Applies To
Rotobrush has shipped three main generations of portable duct cleaning systems, and the coil setup differs slightly across each. The R500 series (the workhorse of the early 2000s) uses a single ignition coil mounted near the blower housing. The iSeries (including the i2 and i3 models) moved to a compact coil pack that’s easier to access but more sensitive to dust buildup. The current aiSeries uses a sealed coil assembly that tends to fail by corrosion rather than heat, especially in coastal climates.
Here’s the compatibility gotcha: an R500 coil will not drop into an iSeries unit without an adapter bracket, and the aiSeries coil is electronically different despite looking nearly identical at a glance. Always match the part number stamped on the coil housing, not just the visual shape. Cardinal Air Duct Yonkers is an independent service provider, not affiliated with Rotobrush, and we carry OEM Rotobrush coils alongside quality aftermarket equivalents from suppliers who meet the same spec sheets. For most homeowners, the aftermarket option saves 30 – 40% with no performance difference. If your unit is under warranty, OEM is the only choice that keeps that coverage intact.
Styles & brands we work with
Signs Your Rotobrush Coil Cleaning Is Failing
- Brush speed drops under load. The coil’s job is to deliver consistent high-voltage spark to the motor. When it degrades, you’ll notice the brush lag in tight duct bends or on longer runs where the motor works harder. The machine runs fine on short bursts, then bogs down.
- Intermittent shutdowns mid-job. A failing coil often overheats and temporarily cuts out. The machine restarts after a cooldown, then dies again. That’s not a motor problem. It’s the coil starving the motor of clean ignition power.
- Starter cord pulls harder than it used to. Weak spark means incomplete combustion, which increases compression resistance. If you’ve noticed the pull-start getting noticeably stiffer, the coil is a likely contributor.
- Rough, uneven idle. When the coil delivers inconsistent voltage, the engine misfires at idle. You’ll hear a stutter or lope that wasn’t there when the machine was new.
- The coil housing shows hairline cracks or a chalky white residue. Heat cycles plus the humidity we get in Yonkers summers cause coil housings to micro-crack. That residue is ionized dust collecting on the failing insulation. Once you see it, replacement is close behind.
Replacement Cost & What’s Included
For Yonkers homeowners, a Rotobrush coil replacement runs $145 – $285 installed. The part itself ranges from $75 – $165 depending on whether you go aftermarket or OEM and which generation your unit is. Labor for the swap is straightforward on most models, typically 45 – 90 minutes, and includes a full test cycle before we hand the machine back to you.
Every coil we install carries the Cardinal 365-Day Done Right Promise: if the part fails within a year, we replace it and reinstall at no charge. And like every job we do in Yonkers, you get a written price before any work starts. No surprise line items, no “while we’re in there” upsells. When we quote you $220 for an iSeries coil replacement, that’s the number on the invoice.
The price range shifts based on a few honest factors: OEM versus aftermarket, whether we need to clean the coil mount area due to heavy dust caking, and how accessible the housing is on your specific Rotobrush. Older R500 units where the coil mount has rusted from years in a damp Yonkers basement sometimes need a mount rebuild, which adds $40 – $60.
See the difference
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AfterDIY or Call Us?
The coil itself isn’t dangerous to handle when the machine is off and unplugged, but the diagnostic process is where most owners go wrong. A failing coil mimics symptoms of a carburetor problem or a worn pull-start assembly, and misdiagnosing means you buy the wrong $150 part and then we’re installing the right one a week later anyway.
What you can safely do: check for visible cracks or white residue on the coil housing, verify your spark plug isn’t fouled (a bad plug can masquerade as a bad coil), and note exactly when the machine stalls. That information helps us pinpoint the issue fast over the phone.
What we don’t recommend: opening the ignition housing without clearly marking wire positions. Rotobrush units have tight clearance inside the motor compartment, and a pinched wire during reassembly creates a whole new problem. If you’re in Yonkers and want this fixed without the trial-and-error, call us at (914) 613-6563. We’ll quote you the part and labor honestly while you’re still on the phone.
FAQs
On units used for regular residential work in Yonkers, an OEM coil lasts roughly 700 – 1,200 operating hours, or 4 – 7 years for a part-time cleaning schedule. The aiSeries coils tend to fail earlier due to corrosion, especially in homes near the Hudson River where indoor humidity runs higher. Aftermarket coils that match the spec sheet generally last within the same range. Call (914) 613-6563 if you’d like us to check your unit’s run-time history.
Not reliably. The coil’s failure mode is internal breakdown of the winding insulation, and once that starts, re-wrapping or re-epoxying is a temporary patch that fails again under heat. Replacement is the only fix that holds. The good news is that a coil swap is one of the more affordable Rotobrush repairs, and we keep the common sizes in stock at our Yonkers location.
Most coil replacements take 45 – 90 minutes on the bench. If you bring the unit to us in Yonkers, it’s often a same-day turnaround. If we come to you, we can usually schedule within a couple of business days, and the job still takes under two hours. Before-and-after photos of the work are included, per The Relay Standard.
Yes. We stock OEM and aftermarket coils for the R500, iSeries, and aiSeries, plus the common mounting brackets they require. Lennox, Trane, and Carrier units use different ignition components entirely, so if your machine is one of those brands, call us first and we’ll tell you honestly whether we carry the part or need to order it. For Rotobrush specifically, there’s an excellent chance the right coil is on our shelf today.
Call Cardinal Air Duct Yonkers for Rotobrush Coil Repair
If your Rotobrush is struggling, don’t wait until it dies in the middle of a job. Call us at (914) 613-6563 for a straightforward diagnosis and an honest quote. We’ll tell you whether you need a coil replacement, a spark plug, or something else entirely, and you’ll get a written price before any work begins. That’s how we work in Yonkers: straight answers, professional-grade parts, and a 365-day guarantee on every repair we make.
Written by Omar Haddad, Owner, Cardinal Air Duct Yonkers at Cardinal Air Duct Yonkers, serving Yonkers and nearby areas.