This service visit was completed by Fast Affordable Air for a rooftop Heating and Cooling system in the Las Vegas area. The goal was to help the AC cool better, run safer, and avoid surprise breakdowns during hot weather.
Helpful pages from our site for related services: HVAC Services, Air Conditioning Las Vegas, Home
What we saw on the roof
The pictures show a rooftop AC unit sitting on a metal stand above a shingle roof. Rooftop units are common on some homes and buildings because they save yard space and keep the big equipment out of the way.
We also noticed a problem with the electrical protection on the roof. One flexible electrical sleeve (called a conduit) looked torn or split near the fitting. A conduit is like armor for wires. It helps protect wiring from sun, heat, rubbing, and water. When it is damaged, the wiring inside can be at higher risk.
Step 1: Safe access and a quick visual inspection
Before touching anything, our technician checked the work area and accessed the service panel. The service panel is the metal cover that protects the electrical and control parts inside the unit. In the photo, you can see the panel removed and set aside while we work.
We look for simple clues first: loose screws, burnt spots, rubbing wires, oil stains, and anything that looks out of place. A fast visual check can prevent bigger problems later.
Trade word: Service panel means the cover that blocks dust and rain from getting into the electrical compartment. Example: “We removed the service panel so we could inspect the wiring and controls.”
Step 2: Hook up gauges to check refrigerant pressures
Next, we connected a Mastercool manifold gauge set to the unit. These gauges help us see how the refrigerant is behaving while the AC is running. Refrigerant is the special fluid inside the system that moves heat out of the home and releases it outside.
In the gauge photo, the blue gauge is the low-side (also called suction) pressure, and the red gauge is the high-side (also called discharge) pressure. The needles appear to be around about 120 psi on the low side and roughly 300–320 psi on the high side (actual “good” numbers depend on outdoor temperature, indoor load, and the type of refrigerant).
Trade word: Manifold gauges are the tool with two dials and hoses used to read system pressures. Example: “We used manifold gauges to confirm the AC pressures were in a normal range for the conditions.”
Trade word: Suction is the cooler vapor line returning to the compressor. Discharge is the hotter line leaving the compressor. Example: “Low-side suction pressure and high-side discharge pressure help tell the story of how the AC is operating.”
Step 3: Check the unit while it runs
While pressures were being monitored, we checked the unit’s operation. That includes listening for unusual noises, confirming the fan is moving air, and making sure panels and wiring are secure. In one photo you can see tools used for service, including an infrared temperature tool, which helps us spot hot spots and confirm air temperatures without touching moving parts.
When an Air Conditioner struggles, it often works longer and harder. That can raise electric bills and wear parts out faster. A proper system check helps catch small issues before they become a no-cooling emergency.
Step 4: Fixing a damaged conduit area (electrical protection)
The torn flexible conduit shown in the close-up photo is important. On a roof, sunlight and heat can dry out materials over time. If the conduit splits, it may let in water or allow the wire jacket to rub. Either issue can cause shorts, nuisance trips, or equipment failure.
A correct repair usually means replacing the damaged section, securing it tightly to the fitting, and making sure the wiring inside is not nicked. It is a small-looking detail that can make a big difference in safety and reliability.
Trade word: Conduit is a protective tube for electrical wires. Example: “We repaired the conduit so the wiring stayed protected from sun and weather.”
Why these steps help the homeowner
- Better comfort: When pressures and airflow are right, the Central Air Conditioning system cools more evenly.
- Lower strain on parts: A healthy system runs smoother, which can help the compressor and fan last longer.
- Energy savings: A unit that is not struggling may run fewer extra minutes, which can reduce wasted power.
- Safer operation: Fixing electrical protection items (like damaged conduit) helps reduce risk from weather and wear.
For general homeowner education, the U.S. Department of Energy has helpful guidance on AC care and efficiency.
Quick summary of what the photos show
- A damaged flexible electrical conduit near the rooftop unit that needs proper protection and securing.
- The rooftop AC unit on a metal stand, with clear roof access around it.
- The service panel removed so internal components can be inspected safely and correctly.
- Mastercool manifold gauges connected to verify refrigerant pressures while the system runs.
