Fix leaky and damaged ducts for better comfort and lower energy bills. We provide honest diagnostics and professional repairs for Sylmar homeowners.
Duct Cleaning & Air Duct Service in Sylmar
LC Heating & Air provides duct cleaning in Sylmar — including air duct cleaning, duct repair service, duct sealing, HVAC ductwork. Whether you need same-day service, a written estimate, or help deciding between repair and replacement, our licensed technicians handle every make and model.
We repair and service all major HVAC brands in Sylmar, including Carrier, Trane, and Goodman, and older or discontinued units. No matter the manufacturer, we diagnose the problem accurately and give you an upfront price before any work begins.
I'm Leo, owner of LC Heating & Air. If your home in Sylmar has rooms that never seem to get comfortable, or your energy bills are climbing despite the system running fine, the problem is often hiding in your ductwork. Most homeowners don't realize that 20–30% of their conditioned air can be lost through leaks before it ever reaches the living space.
In our local climate, that means you are paying to cool your attic instead of your home. I focus on finding exactly where those leaks are—whether it's a disconnected flex duct or a poorly sealed plenum—and providing a clear, honest assessment of whether a repair will solve the issue or if the system needs more significant work. We are CSLB #1073586, and we believe in giving you the facts before we touch your equipment.
Call LC Heating & Air at (323) 970-3113 for scheduling and estimates.
Local HVAC considerations
Sylmar, CA 91342
CSLB #1073586
(323) 970-3113
Common Duct Issues in Sylmar Homes
Sylmar has a mix of housing styles, from older homes to newer remodels, and I see a lot of the same duct issues across the board. The most common problem is crushed or disconnected flex ducting, often caused by foot traffic in tight attic spaces. When a duct gets pinched, the airflow to the room it serves drops significantly, which is why some rooms in your house might feel stuffy while others are fine.
I also frequently find leaky boots and joints where the ductwork connects to the ceiling registers. In our dry, dusty climate, these leaks don't just lose cold air; they pull in attic dust and insulation fibers, which then get blown directly into your living space. If you notice a whistling sound when your AC kicks on, that is a classic sign of a leak in the supply or return system.
Why Duct Condition Matters
Because Sylmar homes vary in age, the duct systems vary just as much. Older homes might have original sheet metal ducts that have lost their seal over time, while newer homes with flex ducting are prone to sagging and tearing. My diagnostic process focuses on the whole system—return sizing, duct leakage, and register balance.
If your ducts are undersized or poorly routed, even a brand-new HVAC unit won't perform correctly. I look at how the equipment is placed and how the air is moving through the house. Before recommending any repair, I want to make sure we are addressing the root cause, not just putting a band-aid on a system that might be struggling with larger design flaws.
How We Diagnose Your System
I don't believe in guessing. When I come out to your home, I start by measuring the airflow at your registers to see what the system is actually delivering. We perform duct pressurization testing—often called a duct blaster test—to quantify exactly how much air is leaking out of your system.
This test gives us a clear number. Once I have that data, I can show you exactly where the leaks are and explain what the repair will involve. You will get a written estimate before we start any work, so you know exactly what you are paying for and what the expected outcome will be.
Repair or Replace?
This is the most important conversation I have with homeowners. If the ductwork is in decent shape but has a few disconnected runs or leaks at the joints, a targeted repair is often the best path forward. It's cost-effective and can provide immediate comfort improvements.
However, if the ductwork is severely undersized, falling apart, or made of outdated materials that are beyond sealing, I will be honest with you about that. Sometimes, trying to repair a failing system is throwing good money after bad. My goal is to help you make a decision that makes sense for your home and your budget, not just to sell you a service.
Understanding Costs
Duct repair costs depend on the scope of the work and how accessible the ducts are. A simple repair to a disconnected section might be straightforward, while comprehensive sealing of a whole system takes more time and labor. For hard-to-reach leaks, we offer Aeroseal, which seals ducts from the inside.
We provide written estimates for all jobs. Whether it's a $125 inspection or a more extensive repair, I want you to understand the value of the work. We don't use high-pressure sales tactics; we provide the diagnostic, the price, and the plan, and let you decide how you want to proceed.
Air Quality and Safety
Duct leaks are a major contributor to poor indoor air quality. When your return ducts leak in the attic, they pull in dust, insulation, and potential mold spores, circulating them throughout your home. This is especially relevant in our area where wildfire smoke and dust are common concerns.
By sealing your ducts, we aren't just improving airflow; we are stopping your system from acting like a vacuum for your attic. This leads to a cleaner home and a system that doesn't have to work as hard to filter out contaminants, which helps your equipment last longer.
Mistakes to Avoid
The biggest mistake I see is homeowners trying to fix ducts with the wrong materials—like standard duct tape, which dries out and falls off in the heat of an attic. You need professional-grade mastic and foil tape to ensure the seal lasts.
Another mistake is assuming that 'more air' is always better. If you just add a new vent without balancing the system, you can actually cause more pressure issues. We look at the whole system to ensure that when we fix a leak, we aren't creating a new problem somewhere else.
Scheduling and access — Duct Repair in Sylmar
Parking, gate codes, and attic or rooftop access in Sylmar are confirmed when you book duct repair service so the crew arrives with the right ladders and PPE.
Same-week appointments are common; emergency calls are answered within 30 minutes by phone.
How We Help You Decide
I know that inviting a contractor into your home is a big decision. My approach is simple: I treat your home like it's my own. I'll show you the diagnostic results, explain what I see in the attic, and tell you if a repair is going to solve your problem or if you're looking at a larger issue.
You won't get any sales fluff from me. You'll get a practical, plain-spoken assessment of your duct system. If it's worth repairing, we'll fix it right. If it's time to consider a replacement, I'll explain why so you can make an informed choice.
How the visit works
We perform a thorough diagnostic, including airflow measurements and duct pressurization testing.
We provide a written estimate detailing the specific leaks and the proposed repair plan.
We perform the repairs using professional-grade mastic and sealing techniques.
We re-test the system to verify that the leakage has been reduced and airflow has improved.
Cost factors we review before quoting
- • Accessibility of the ductwork in attics or crawl spaces
- • Total amount of duct leakage identified during testing
- • Type of repair required (manual sealing vs. Aeroseal)
- • Size and complexity of the existing duct distribution system
Useful next steps
Duct Repair in Sylmar at a glance
- • Duct Repair provider: LC Heating & Air
- • Location served: Sylmar, CA 91342
- • License: CSLB C-20 #1073586
- • Phone: (323) 970-3113
- • Estimate: written estimate before approved work
- • Emergency calls answered within 30 minutes (24/7)
Our duct repair process in Sylmar
Reviewed by Leo, Owner & Lead Technician
This duct repair guide for Sylmar is reviewed for practical HVAC accuracy by Leo at LC Heating & Air. LC Heating & Air holds California CSLB C-20 HVAC license #1073586 and provides written estimates before approved work.
What Sylmar customers say about duct repair
Verified reviews from homeowners in Sylmar and nearby neighborhoods who used our duct repair service.
“Our AC stopped working during a heat wave and LC had a technician here within two hours. He diagnosed a bad capacitor, had the part on his truck, and fixed it on the spot. Fair price, no upsell. Will use again.”
“Called on a Saturday because AC was blowing warm air. LC answered, sent someone the same afternoon. They found and fixed a refrigerant leak. Professional and reasonably priced.”
“Woke up to no AC at 6am. LC was at my door by 9am. Frozen evaporator coil — they explained exactly why it happened (dirty filter + low airflow) and fixed it same visit. Very professional.”
