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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Before
AfterAprilaire Coil Cleaning: The Cumming Owner’s Guide
Aprilaire evaporator coil cleaning in Cumming typically runs $340-$580 for a full system service, depending on coil accessibility and whether the plenum (the sheet-metal box above your furnace) needs to be opened for access. We stock Aprilaire-compatible foaming cleaners and fin combs on every truck, and most residential jobs in the Cumming area are completed in a single visit. Homeowners usually discover the problem when their Aprilaire humidifier or air cleaner starts producing a musty, wet-cardboard smell in July, or when their AC runs constantly but the second floor in Vickery or Windermere never quite cools.
Which Aprilaire Models This Applies To
Aprilaire coil cleaning applies to any system with an Aprilaire whole-home humidifier (500, 600, 700, or 800 series) or air cleaner (2210, 2410, 4200, or Space-Gard 2400) installed downstream of the evaporator coil. The critical detail is coil location, not the Aprilaire unit itself. The 600 and 700 series humidifiers mount on the supply plenum, directly above the coil in most Cumming basements. If your Aprilaire label shows a model number starting with those digits, the coil feeding it needs periodic cleaning.
Identification is straightforward. The coil sits in the A-shaped or N-shaped assembly above your furnace. Aprilaire OEM cleaning foam (part 4793) is formulated for aluminum fins at 8-14 fins per inch, which matches most residential coils installed in Forsyth County between 2010 and 2020. We also carry quality aftermarket foaming cleaner from Guardsman that meets the same spec. The aftermarket saves roughly $30 on material cost, but we default to Aprilaire 4793 on systems still under manufacturer warranty. Mixing cleaners can leave residue that voids humidifier coverage. That is the compatibility gotcha we see most often in Cumming.
Signs Your Aprilaire Coil Cleaning Is Failing
- Musty odor when the blower starts. Bacterial growth on the coil surface produces a wet-sock smell that hits hardest after the system has been idle. In Cumming’s humidity, a dirty coil can smell within 48 hours of the last cycle.
- Ice formation on refrigerant lines. Dirt insulates the coil, restricting heat exchange and dropping surface temperature below freezing. The ice you see on the copper line set starts at the coil, even if the coil itself is hidden.
- Water pooling below the furnace. A clogged condensate pan or blocked drain line backs up when debris slides off an overloaded coil. We find this regularly in two-story homes near Coal Mountain where the primary drain runs a long horizontal stretch.
- Humidifier pad crusts within weeks. When the coil cannot dehumidify properly, the Aprilaire unit works overtime and mineral deposits accelerate. A pad that used to last a season now cakes in six weeks.
- Static pressure reading above 0.5 inches WC. Your HVAC technician’s manometer picks this up during routine service. A dirty coil raises resistance across the system, straining the blower motor and shortening its life.
BeforeAfterReplacement Cost & What’s Included
| Service Level | Price Range | What’s Included |
|---|---|---|
| Standard coil cleaning (accessible, no plenum removal) | $340-$420 | Power-down, foaming cleaner application, fin straightening, condensate pan flush, before-and-after photo record |
| Deep cleaning (plenum opened, coil removed) | $480-$580 | All standard services plus plenum disassembly, coil extraction, both-side cleaning, seal inspection, reassembly with new gaskets |
| Aprilaire humidifier pad replacement (add-on) | $65-$85 | OEM #35 or #45 pad, scale control insert, installation, documentation |
What drives the range is access. Coils in upflow furnaces with a removable front panel take 90 minutes. Downflow systems in attic installations, common in the newer Cumming subdivisions off Bethelview Road, require cutting and resealing plenum sheet metal. We quote the exact price after visual inspection, before any work starts, under Haven Standard Clause 1. The 365-Day Done Right Promise covers the workmanship. The photo record, delivered before we leave, shows every stage.
DIY or Call Us?
What you can safely check: the Aprilaire humidifier pad condition, the condensate drain line for visible clogs, and whether the coil surface shows dust buildup through a sight glass or inspection mirror. These checks cost nothing and tell you if professional cleaning is warranted.
Where DIY goes wrong: evaporator coils live under high voltage (240V in most Cumming homes) and refrigerant pressure. Bending a fin is cosmetic; piercing the refrigerant tubing is a $1,200+ repair. Foaming cleaner left on too long corrodes aluminum. And without a borescope or inspection camera, you cannot see the back side of the coil where debris concentrates. We carry Nikro and Rotobrush equipment specifically for this, and our technicians work under Haven Standard Clause 3: Verified Crews. The camera doesn’t have an opinion - it just shows you what’s in there.
For a written price before any work starts, call (678) 693-5322. Estimates are free, and we publish our license number on every quote.
FAQs
In Forsyth County’s climate, with pollen seasons running March through October and summer humidity averaging 70%, a thorough coil cleaning typically stays effective for 18 to 30 months. Homes with pets or near active construction may need attention closer to the 18-month mark. Call (678) 693-5322 and we’ll assess your specific conditions.
No. A dirty coil cannot be “repaired” - it must be cleaned or, in cases of severe corrosion or fin deterioration, replaced entirely. Replacement coils run $1,800-$2,800 installed in Cumming, which is why we document the actual condition with photos before recommending anything beyond cleaning. Call (678) 693-5322 for an honest assessment.
Most residential Aprilaire coil cleanings take 2 to 3.5 hours from arrival to final documentation. Add 45 minutes if we’re also replacing the humidifier pad or servicing the Aprilaire 800 steam canister. We schedule a specific arrival window, not an all-day wait. Call (678) 693-5322 to book.
Yes. We carry Aprilaire 4793 foaming cleaner, #35 and #45 humidifier pads, and common gaskets for the 500 through 800 series on every service vehicle. For less common Aprilaire components or Lennox, Trane, and Carrier parts, we source same-day from our Forsyth County supplier. Call (678) 693-5322 to confirm availability for your model.
Written by Tomas Reyes, Owner, CleanRun Air Duct Cleaning Cumming at CleanRun Air Duct Cleaning Cumming, serving Cumming and nearby areas.