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.
Why San Bernardino Homeowners Choose Lennox Air Duct Cleaning
We provide independent Lennox air duct cleaning, evaporator coil cleaning, and San Bernardino Lennox service including duct repair, working on everything from older G61MPV Signature furnaces to newer EL296V variable-speed units. What separates our Lennox work is that we don’t just run a vacuum through the registers. We open the cabinet, inspect the coil gasket and blower wheel, and fix what the manufacturer’s design allows to fail in our specific climate. Lionheart Air Duct Cleaning is an independent provider, not affiliated with or authorized by Lennox, but we know these systems inside and out. Call (855) 356-4382 to schedule a free estimate.
Why Trust Lionheart Air Duct Cleaning for Your Lennox Air Duct Cleaning?
Roland Cifuentes, our owner and lead technician, grew up in San Bernardino’s Westside near Cal State San Bernardino, and picked up his HVAC fundamentals at San Bernardino Valley College before going full-time into duct work. He has spent decades watching what the Mojave Desert grit and valley smog do to Lennox systems in this city. We have cleaned and sealed ducts on hundreds of Lennox systems across San Bernardino, from older G-series furnaces to newer variable-capacity units, so we recognize exactly how their cabinet seals and coil enclosures fail here. A Lennox system in a 1960s tract home on the west side behaves differently than one in a newer north-end development with flex duct. We service both, and we know what to look for in each. When we open a Lennox air handler, we are checking for specific failures: dried butyl-rubber gaskets on the evaporator access panel, compressed cabinet seals on Merit and Elite series units, and static-pressure problems unique to variable-speed Signature blowers. That diagnostic depth is what your average duct cleaning crew does not bring to the job.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
Common Lennox Air Duct Cleaning Problems We Fix in San Bernardino
- Dried evaporator coil access gaskets on G61MPV and Signature Collection units. Lennox uses a factory butyl-rubber gasket on the coil access panel, and after 6 to 10 years in San Bernardino’s dry heat, that gasket shrinks into a brittle ribbon. Return air then bypasses the coil entirely, pulling unfiltered attic dust across the blower wheel and into every supply boot in the house. We replace the gasket and clean the wheel and cabinet.
- Compressed and torn cabinet seals on Merit ML180UHE and Elite EL296V units. The seals on these air handlers compress over time, and when they tear, the cabinet develops pressure imbalances that pull attic insulation fibers into the supply trunks. Homeowners see gray fuzz on register covers and wonder where it came from. We re-seal with OEM gaskets where the seal itself is the failure point, and mastic where the seam needs structural work.
- Clogged evaporator coil drain pans in horizontal attic installs. San Bernardino attics get hot, and horizontal Lennox coils collect algae and mud-dauber nests in the drain pan. When the pan overflows, water runs into the flex duct, saturates the insulation, and creates a musty smell that comes back through the returns every time the blower runs. We clear the pan, clean the coil, and dry or replace affected flex duct.
- Variable-speed blower static-pressure issues on newer Signature series furnaces. Lennox variable-speed ECM blowers pull much higher static pressure than the old PSC motors. A minor flex duct kink between the furnace and the trunk that never bothered the old motor will now trip the high-limit switch and cause hot rooms. We find the kink, straighten or replace the flex, and verify static pressure after cleaning.
- Return plenum contamination on XC20 and XC21 systems paired with CBX ducted coils. These higher-end systems move serious air, and when they run in San Bernardino’s dusty environment, the return plenum collects a layer of desert grit on every surface. If the filter slot is not tight, that grit coats the coil, cuts airflow, and drives up the system’s amp draw. We clean the plenum, verify the filter door seal, and clean the coil with a no-rinse foaming agent.
Lennox Parts & Our Repair-vs-Replace Approach
We use Lennox OEM gaskets and access covers when the cabinet seal is the source of the leak. That is a situation where the aftermarket part simply does not match the tolerances. But for sealing duct seams, standard UL-listed mastic and foil tape are functionally equivalent to anything the manufacturer sells, and far more cost-effective. The same applies to flex duct replacement. We stock common Lennox gasket sizes and cabinet seal stock locally, so our Lennox service in Muscoy and throughout San Bernardino does not stall waiting on a parts ship. On repair versus replace, we are blunt: we only recommend replacing a Lennox furnace or coil when a heat exchanger crack or coil leak is confirmed. A dusty blower wheel, a torn gasket, a clogged drain pan – those are repairs. If someone quotes you a full system replacement because your ducts are dirty, call us instead at (855) 356-4382 for a second opinion.
Our Lennox Service Process – Step by Step
- 1
Diagnosis. We inspect the cabinet gaskets, coil access panel, drain pan, blower wheel, and return plenum on your specific Lennox unit. We check static pressure on variable-speed models and note any flex duct runs that show kinks or sag. We find the source of the contamination, not just the symptom.
- 2
Repair or seal. We replace failed gaskets with OEM parts where required, seal cabinet seams with mastic or foil tape, clear drain pans, and repair or replace damaged flex duct before we start cleaning. Cleaning a leaking system just re-contaminates it.
- 3
Clean. We run full system cleaning with Rotobrush and Nikro equipment: supply trunks, return drops, boots, plenums, blower wheel, and evaporator coil. We use Abatement Technologies negative-air equipment for containment, so the dirt we dislodge leaves through the vacuum, not through your living room.
- 4
Verify. After reassembly, we run the system and confirm airflow, static pressure, and cabinet seal integrity. We show you what we pulled out and what we fixed. The job is not done until you can see the difference.
See the difference
Before
After
Before
After
Before
AfterLennox Products We Service & Install in San Bernardino
We work on the full range of Lennox equipment found in San Bernardino homes. That includes the G61MPV from the Dave Lennox Signature Collection, the EL296V two-stage Elite Series furnace, the ML180UHE Merit Series, and the XC20 and XC21 air conditioners paired with CBX ducted coils. For older homes on the west and north sides with original sheet-metal duct systems, we provide Colton Lennox service and tune undersized trunks and seal leaking seams. For newer flex-duct installs in the east and north end, we repair sags, kinks, and the separation points that let debris in. We handle evaporator coil cleaning, full system cleaning, and mastic sealing on all of these lines.
We Also Service These Brands
While we know Lennox systems deeply, we are not a single-brand shop. We service and clean ducts on Trane and Carrier equipment throughout San Bernardino County, along with Lennox in Highland and Honeywell and Aprilaire air-quality components. Humidifier, filter, or ventilation accessories often pair with the main furnace, and we work across all of it.
FAQs – Lennox Air Duct Cleaning Service in San Bernardino
No. We are an independent air duct cleaning and repair company. We are not affiliated with, authorized by, or endorsed by Lennox International. We work on Lennox systems because we know them well, not because the manufacturer sent us.
Yes, where the part matters. We use Lennox OEM gaskets and access covers when the cabinet seal is the failure point, because aftermarket versions do not match the factory tolerances. For duct sealing and flex replacement, we use UL-listed mastic, foil tape, and flex duct, which are functionally equivalent and cost less. Call (855) 356-4382 and we will tell you exactly what your system needs.
A typical full system cleaning on a single Lennox furnace in San Bernardino takes 3 to 5 hours, depending on the size of the home and the condition of the ducts. If we find failed gaskets, clogged drain pans, or damaged flex duct, the repair work adds time. We do not rush the job. Duct cleaning is a scheduled service, not an emergency call.
We service the G61MPV from the Dave Lennox Signature Collection, the EL296V from the Elite Series, the ML180UHE Merit Series, and XC20/XC21 air conditioners with CBX ducted coils. If you have an older Lennox unit not listed here, call us. We likely work on it too, and we will tell you honestly if we do not.
No. Proper air duct cleaning using containment equipment and non-damaging methods does not void a Lennox furnace or coil warranty. What can void a warranty is running the system with a clogged coil or high static pressure caused by dirty ducts and kinked flex. A clean, properly sealed system runs within factory airflow specs, which is exactly where the warranty stays valid.
It could be either, but on G61MPV units in San Bernardino we most often find it is a failed evaporator coil access gasket. When that butyl-rubber gasket dries and shrinks, the return air bypasses the coil and drags attic dust across the heat exchanger. That dust bakes on the first heat call and smells exactly like what you are describing. We pulled a G61MPV from a 2004 San Bernardino ranch home and found the gasket had shrunk to a brittle ribbon, so for years the return had been sucking attic dust past the coil and spraying it into every supply boot. We cleaned the coil with a foaming no-rinse treatment, wiped down the blower wheel, and re-sealed the cabinet with OEM gasket and mastic. The homeowner’s burning dust smell disappeared. Call (855) 356-4382 for a free estimate and we will diagnose yours the same way.
Yes. That is exactly what a torn or degraded cabinet seal allows. The blower creates negative pressure inside the cabinet, and if the gasket is compromised, that negative pressure pulls air from the attic around the coil instead of through the filter. That attic air carries insulation fibers, dust, and whatever else is up there straight into the supply trunks and out your registers. If you see gray fuzz on your vents, that is often the source.
Yes. Older PSC blower motors tolerated resistance better. Lennox variable-speed ECM motors ramp up to maintain airflow, and when ducts are dirty, kinked, or undersized, the motor works harder against higher static pressure. This trips high-limit switches, shortens motor life, and increases electricity draw. A clean, sealed duct system keeps the blower within its designed pressure range. If you have a variable-speed Lennox system and notice hot or cold rooms, call (855) 356-4382. We will measure the static and find the restriction.
Stand near a return register and smell for musty or mildew odor while the blower runs. Check for water stains on the ceiling below the attic unit. Look at the flex duct connections under the coil for sagging or dark spots. If any of these are present, the drain pan is probably clogged or cracked and overflow is getting into the duct insulation. This is a common San Bernardino problem in horizontal attic installs. We clear the pan, clean the coil, and replace any saturated insulation.
Yes. We clean the duct system and the dryer vent as part of one appointment in San Bernardino. It makes sense to do both at once, especially when the chase is open. Lint buildup in a dryer vent is a leading cause of residential dryer fires, so we treat it as a safety service, not an add-on. One visit, both systems clean and verified. Call (855) 356-4382 to schedule.
Book Your Lennox Service in San Bernardino, CA
If your Lennox system has been running on San Bernardino air for years, it has collected what this city puts in the air. We will open it up, show you what’s there, and fix it properly. Call Lionheart Air Duct Cleaning at (855) 356-4382 for a free estimate on Lennox air duct cleaning, coil cleaning, or repair.
Written by Roland Cifuentes, Owner at Lionheart Air Duct Cleaning, serving San Bernardino and the surrounding Inland Empire.