HVAC Duct and Air Handler Cleaning in Lewisville
The ducts are only the pipes. The dirt that matters most for airflow and smell tends to sit in the cabinet at the end of them.
What is in the cabinet
In a typical Lewisville house the air handler, or the furnace with a coil on top, sits in the attic or a hall closet. Return air comes in through the filter, passes the blower wheel, crosses the evaporator coil where it is cooled and dried, and leaves through the supply plenum into the ducts. The coil is wet for most of the year, because pulling water out of humid North Texas air is half its job. Wet, cold metal is the one place in the system where dust sticks and stays.
The coil and the blower
A matted coil
Dust that gets past a poor filter, or around a filter that does not fit its slot, lands on the wet face of the coil and turns to a felt mat. Airflow drops, the coil can ice up, and the system runs longer to do less. Cleaning it is careful work: the fins bend easily, and the EPA's test for a finished job is that light passes through the coil and the fins are straight.
A caked blower wheel
The blower wheel's curved blades collect a layer of dust on their leading edges. A thin layer is enough to cut the air the wheel moves. Cleaning it usually means pulling the blower assembly out of the cabinet, which is why it is a separate line on a proper quote.
The drain pan and line
The condensate pan under the coil and the line that carries the water away grow algae and slime in the warm months. A blocked line overflows, and in an attic installation the overflow lands on the ceiling below or trips the safety switch that shuts the system off on a July afternoon.
Who is allowed to do this in Texas
This is the part of the job where the licence matters. The Texas rule that lets duct cleaners work without a contractor licence, 16 TAC 75.100(c), covers the air distribution system only: supply plenum to the grilles, and return grille to the air handler intake, with no cutting and no electrical changes. Taking the blower out or opening the coil section goes past that line. That work belongs to a contractor licensed by the Texas Department of Licensing and Regulation for air conditioning and refrigeration, or to a duct company that has one on staff. Ask the company quoting you which part of the job its licensed person does, and look the licence up on the TDLR website. It takes a minute and it tells you whether the person opening your air handler is supposed to be there.
When this is worth paying for
If the system is struggling to cool, the coil has frozen, the drain line has backed up, or the blower is visibly dusty when the panel is off, the air handler is the place to spend money first. A duct cleaning without it is the less useful half of the job. If you are booking a duct cleaning anyway, have the coil and blower looked at on the same visit; the EPA's point that an uncleaned component re-contaminates the rest applies directly here.
Call for a free quote and say what the system is doing. A local company can tell you whether the cabinet, the ducts or both are worth the money.
Common questions
Is coil cleaning part of a normal AC tune-up?
A tune-up usually includes a look at the coil and a check of the drain, but not always a full cleaning of a matted coil or the blower. Ask what the tune-up covers before assuming it was done.
Can a dirty coil cause a musty smell?
It can. So can a slow drain pan or wet insulation near the air handler. The smell is a reason to look at the cabinet before anyone talks about cleaning every duct in the house.
Should the coil be treated with a chemical?
Coil cleaners made for the purpose are normal. Sprays sold to "sanitise" the whole system are a different product, and the EPA advises seeing the label and understanding it before agreeing.
How do I check a TDLR licence?
Use the license search on the TDLR website and look for an Air Conditioning and Refrigeration Contractor licence in the name of the company or the person doing the work. Ask for the number; licensed contractors expect the question.
Also in Lewisville
- Duct Cleaning in Lewisville, TX
- Dryer Vent Cleaning in Lewisville
- Mold in Air Ducts: Lewisville Homes
- Duct Cleaning After a Remodel or New Build
Also serving
Air Handler & Coil Cleaning is available beyond Lewisville, across Frisco , Denton , Carrollton , Flower Mound and The Colony .
Get a quote for air handler & coil cleaning
Tell us about the house and a local duct cleaning company will get back to you, usually within a day or two. Answered Mon–Sat, 8am–6pm · after hours we call back the same day Or call (945) 313-5984 — most people get an answer faster that way.