An Air Conditioner is more than the outdoor unit sitting next to the house. A central AC system also has important equipment inside the home, and in many Las Vegas houses that equipment is installed in the attic. This recent project shows why an HVAC technician needs to inspect the whole Heating and Cooling system instead of looking at only one part.
The photos from this project show a Rheem indoor unit connected to an R-410A cooling coil, refrigerant lines, ductwork, electrical controls, and a condensate drainage system. Each part has a different job, but they all have to work together for the central Air Conditioning system to cool the home properly.
Fast Affordable Air provides AC repair in Las Vegas along with Heating and Cooling service throughout the Las Vegas Valley.
Inspecting the Outdoor Refrigerant Lines
The first photo shows the refrigerant lines running beside the exterior wall near the outdoor Air Conditioner. These copper tubes are often called a line set. A line set is simply the pair of pipes that carries refrigerant between the indoor and outdoor parts of the Cooling system.
One of these lines is covered with black insulation. That insulation is important because the larger refrigerant line can become very cold while the AC is running. Keeping it insulated helps prevent unwanted heat from entering the refrigerant before it reaches the outdoor equipment.
The insulation in the photo shows areas that deserve attention during service. A technician checks for damaged insulation, loose sections, rubbing, exposed copper, and signs of refrigerant oil. Refrigerant oil around a connection can sometimes be a clue that a small leak may be present, although a proper leak test is needed before making that diagnosis.
Accessing the Rheem Indoor HVAC Equipment
The second photo takes us into the attic. Here we can see the indoor Heating and Cooling equipment connected to the home’s duct system. Rheem equipment is visible in this installation.
An indoor unit moves air through the home. The blower pulls warm household air into the HVAC system, moves it across the cold evaporator coil, and then pushes the cooled air back through the supply ducts.
The evaporator coil is the indoor section where refrigerant absorbs heat from the air. A simple way to think about it is like a cold radiator. Air passes across the coil, heat moves into the refrigerant, and cooler air continues through the ductwork.
During an attic AC repair, the technician also checks the surrounding duct connections. Air leaking from poorly sealed ductwork can waste cooled air inside the attic instead of delivering it to the rooms where it belongs.
Checking the Evaporator Coil and Condensate Drain
Photos three and four provide a clear look at the coil cabinet and the white PVC drain piping underneath it.
When warm air passes over a cold evaporator coil, water forms on the coil. This water is called condensate. It is similar to the water that forms on the outside of a cold drinking glass.
The condensate has to leave the AC system through the drain line. The photos show the drain connection, PVC piping, and a trap. A condensate trap is a curved section of pipe designed to help the drainage system work correctly when air pressure is present inside the equipment.
Drainage problems may sound small, but they can become a major headache. A clogged drain can cause water to collect around the air handler, damage insulation or drywall, trigger a safety switch, or cause the Cooling system to shut down.
That is one reason condensate drainage should be checked during routine AC maintenance as well as during repair work.
Inspecting the Electrical and Control Section
The fifth photo shows the Rheem equipment with the service panel removed. This gives the technician access to the electrical and control components.
Low-voltage wiring allows the thermostat and HVAC equipment to communicate. The system also contains electrical parts that control the blower and other components. Loose wiring, overheated connections, damaged terminals, or a failed control part can cause an Air Conditioner to operate incorrectly even when the refrigerant side of the system is in good condition.
During service, these connections should be visually inspected and tested as needed. Electrical work inside an HVAC system should be handled carefully because the equipment can contain both low-voltage control power and higher-voltage electrical power.
Confirming the R-410A Refrigerant System
The sixth photo shows an R-410A label on the indoor coil cabinet along with service equipment connected to the refrigerant circuit.
Refrigerant is the fluid that carries heat through the Air Conditioning system. This particular equipment is marked for R-410A. The correct refrigerant must be used for the equipment it was designed for.
HVAC technicians can connect service gauges to evaluate how the refrigerant system is operating. Pressure readings, temperatures, airflow, and manufacturer specifications are considered together. Refrigerant should not simply be added because an AC is not cooling. If refrigerant is actually low, the technician should determine why it is low and look for possible leakage.
Why the Whole Central AC System Matters
These pictures show how many separate pieces affect indoor comfort. Refrigerant lines carry heat. The Rheem indoor equipment moves air. The evaporator coil removes heat and moisture. The condensate piping carries water away. Electrical controls tell the system when and how to operate. Ductwork delivers the cooled air throughout the house.
When these parts are correctly installed and operating together, the central Air Conditioner can maintain more even temperatures, control humidity better, and avoid wasting as much energy through damaged insulation, airflow problems, drainage trouble, or incorrect operation.
Las Vegas Cooling equipment works especially hard during long periods of high outdoor temperatures. Inspecting the indoor and outdoor portions of the system gives the technician a much better picture of the actual problem than replacing a part based only on a guess.
Fast Affordable Air’s HVAC services include Air Conditioning repair, maintenance, installation, Heating service, and related Cooling system work throughout the Las Vegas Valley.