Top-rated independent heating and cooling across California's Central Valley and the Sierra foothills
Leaky Duct Diagnosis
Leaky duct diagnosis is the job of finding where your conditioned air is escaping before it ever reaches a room, and we do it for homeowners across California and Nevada. If one bedroom never cools, the system runs and runs, or your attic feels colder than the house in winter, leaking ducts are a likely cause. Call us and we will schedule a visit, walk the attic and crawlspace, test the system under pressure, and show you what we find before any repair work starts.
Call (888) 381-2953- A real person answers
- Open 7 days
- Written quote before work starts
Taking calls until 5:00 PM PT
What a duct leak diagnosis involves
We start with the symptoms you have noticed, then measure. That means checking airflow and temperature at each supply register, comparing them room to room, and looking for the rooms that fall behind. From there we get into the attic or crawlspace and inspect the runs by hand and by eye. Flex duct pulls loose at boots and plenums, mastic dries and cracks, and rodents chew insulation. We pressure test the duct system when the layout allows it so the leak rate is a number, not a guess.
What we check and what we repair
We look at every connection point first, because that is where most loss happens. Boot to ceiling seals, take-off collars, plenum joints, and the return where it meets the air handler. We check for crushed or kinked flex, ducts that have dropped off their hangers, and sections buried under blown-in insulation. Return leaks matter as much as supply leaks, since a return pulling attic air brings dust and heat straight into the system. Repairs run from resealing joints with mastic to replacing collapsed runs outright.
How we decide duct work is the right call
We only call it ducts when the evidence points there. If the equipment is producing a proper temperature split at the coil but rooms still will not hold setpoint, air is being lost between the unit and the register. Big differences between rooms on the same run, a system that never cycles off in summer, and dust that returns days after cleaning all point the same direction. If the readings say the problem is at the equipment instead, we tell you that and handle the air conditioning repair or heating repair itself.
The same on every visit
The quote comes first, in writing
Covering 123 cities across California, Nevada.Phones answered by people
Open 7 days, 8:00 AM to 5:00 PM PT.Independent of every manufacturer
Carrier, Trane, Lennox, Goodman and more. We are not an authorized dealer for any of them.Leaky Duct Diagnosis — quick answers
How do I know if my ducts are leaking or if my AC unit is failing?
Testing tells us. If the system is cooling properly at the coil but rooms are warm, the loss is in the ducts. If the equipment itself is underperforming, that is an air conditioner repair instead.
Can leaking ducts make my house dusty?
Yes. A leaking return pulls attic or crawlspace air into the system, which carries insulation fibers and dust into every room. Sealing the return usually cuts the dust noticeably within a week.
Do you have to tear into ceilings to find duct leaks?
Almost never. Most residential duct runs are reachable from the attic or crawlspace, and we inspect and pressure test from there. We tell you before any access work if a run truly cannot be reached.
How it works
- Step 1
Tell us the symptom
Call or fill in the quote form. We ask what changed, when it started, and what the thermostat reads. That tells us whether to bring parts for a cooling fault or a heating fault.
- Step 2
We diagnose on site
A technician checks the thermostat, the electrical side, airflow through the filter and coil, refrigerant pressures, and the outdoor unit. You get told what failed and why, in plain words, before anything is replaced.
- Step 3
Repair and verify
We make the repair, then run the system and measure the results at the vents. If a part needs ordering, we say so and give you a realistic window instead of a vague promise.
- A real person answers
- Open 7 days
- Written quote before work starts
Why homeowners call us
- Built for real valley heatWe work in areas where afternoons sit above 110 degrees and systems run for months without a break. That shapes how we size repairs, check capacitors and contactors, and judge whether a compressor is genuinely done.
- Attic and package unitsPlenty of homes across the region run attic air handlers or rooftop package units instead of a garage furnace and a side-yard condenser. We are used to the access, the duct runs, and the drain issues those setups bring.
- Dust and debris we expectAg dust, cottonwood fluff and grass clippings pack condenser coils and starve a system of airflow. We clean what we find and show you the difference, rather than adding refrigerant to a unit that just could not breathe.
- Heating too, not only ACFurnace repair, heat pump faults and no-heat calls get the same attention as summer work. Ignition problems, cracked or failing components and short cycling all get diagnosed before we recommend anything larger.
- All major brands, gas & electricFrom Carrier and Trane to Lennox, Goodman, Rheem and Bryant, serviced independently.
- Straight answersWhen a replacement beats a repair, we tell you, sometimes before we roll a truck.
Leaky Duct Diagnosis
Ready to book leaky duct diagnosis?
Describe the system and your ZIP. The written quote comes before any work.
- A real person answers
- Open 7 days
- Written quotes
- All major brands
- Gas & electric
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