At Fast Affordable Air, we were recently called out to service an older rooftop Amana HVAC package unit in Las Vegas. The homeowner reported weak airflow and uneven cooling throughout the house. After inspecting both the rooftop system and the attic ductwork, we found several issues that needed professional repair.
Step 1: Inspecting the Rooftop Air Conditioner
The home uses a central AC package unit mounted on the roof. A package unit combines all the major parts of the air conditioning system — the compressor, condenser, and evaporator coil — into one cabinet. Unlike a split system that has an indoor and outdoor unit, package systems are popular in Las Vegas because they save space and can be installed directly on the roof.
During our inspection, we noticed signs of wear including rust near the electrical connections, worn insulation on the refrigerant lines, and aged exterior panels. These issues may not stop the AC from running immediately, but over time they can reduce efficiency and increase energy bills.
Step 2: Checking the Ductwork Inside the Attic
Cooling loss often happens not at the unit itself, but in the duct system. In this case, the attic ducts showed several problems:
- Loose and sagging insulation around the flexible ducts
- Gaps where ducts connected to metal collars
- Signs of air leakage, meaning cool air was escaping into the attic before reaching the living spaces
When ducts leak, the air conditioner works harder to keep the home comfortable. This increases energy use and shortens the lifespan of the equipment. According to the U.S. Department of Energy, up to 30% of cooled air can be lost through poorly sealed ducts.
Step 3: Sealing and Reinforcing Ductwork
We resealed the connections with mastic, a thick paste that hardens into a strong, airtight seal. We also reinforced weak spots with foil tape and repaired insulation to prevent heat from the attic transferring into the cool air. This process is simple but makes a big difference in performance and indoor comfort.
Step 4: Testing the Airflow
Once repairs were complete, we tested the system by running the AC through several cooling cycles. Airflow improved significantly, and the home’s temperature began stabilizing across all rooms. The rooftop package unit, while aged, still has working capacity when paired with sealed and insulated ducts.
Benefits of This Repair
- Better cooling performance: More air is delivered to the rooms instead of being lost in the attic.
- Lower energy bills: The system no longer has to overwork to keep up with lost air.
- Extended system life: Reducing stress on the HVAC equipment helps it last longer.
- Improved comfort: The home now cools evenly, even in rooms far from the unit.
If you live in Las Vegas, Henderson, or North Las Vegas and notice weak airflow or uneven cooling, duct leaks may be the culprit. Our licensed team at Fast Affordable Air can inspect your rooftop AC and attic system to make sure your home is running efficiently.
