Air Conditioning Repair & Installation
Arlington TX A/C Service Providers
In the vicious heat of a hot Texas summer, nothing cools you off like a glass of iced tea or lemonade…except, perhaps, a working central air conditioning unit. To make sure yours functions properly in triple-digit heat, you need the help of Arlington TX heating and air conditioning service providers Metro Express Service. Our fast, friendly service technicians and responsive dispatch communication department work to get one of more than 40 service vehicles out to you for the fastest service, repair or replacement possible! We are eager to serve you.
How Air Conditioners Work
The term air conditioning encompasses both the cooling and heating of air, as well as cleaning the air and controlling moisture levels, or humidity, within the air you breathe in a home or office space.
Air conditioners cool a building by removing heat from the indoor air and transferring it to the air outdoors. This is accomplished through the use of a chemical refrigerant within the system, which absorbs the heat and pumps it through pipes to an outside coil, where the heat is then dispersed. There is a fan in the outdoor unit which blows air from the outdoors over the hot coil, drawing the heat out of the refrigerant and into the surrounding air.
Air Conditioning 101
The typical air conditioner system is comprised of four mechanical parts:
- Compressor Pump
- Expansion valve / Metering device
- Evaporator coil & Blower
- Chemical refrigerant
The most common type of central air conditioning unit operates with a split system, consisting of the “hot” side and the “cold” side. The hot side is located outside the home and is the condensing unit, which includes a condensing coil, compressor, and fan. The cold side is indoors, with an expansion valve and cold coil which are often part of your furnace or an air handler. Air is cooled as the furnace blows air through the evaporator coil, and that chilled air is distributed through the house by a series of air ducts. While a window unit contains both the hot and cold side of the air conditioning system, it operates on the same principals.
- The Compressor – This is the heart of your air conditioning system. It is controlled by the thermostat and acts as a punp that forces the refrigerant to flow through the rest of the system. It works to draw in low-pressure, low-temperature refrigerant in a gaseous state, then compress it so it raises the pressure and temperature of the refrigerant. This gas then flows to the condenser coil.
- Condenser Coil – This part of the system removes the heat from the refrigerant. It consists of a series of piping and a fan that draws outside air across the coil. The refrigerant flows through the coil at the same time, so the heat is absorbed into the outside air. The refrigerant is then condensed to a liquid before reaching the expansion valve.
- Expansion Valve – Like the human brain, the expansion valve controls functionality in the air conditioning system. It senses the evaporator’s (cooling coil) temperature, and then it lets the liquid refrigerant pass through a small orifice to the evaporator. As the refrigerant travels through the opening, it is expanded back into a low-pressure, low-temperature gas.
- Evaporator Coil – This series of piping is attached to a furnace or air handler indoors, which blows air across the evaporator coil. The coil absorbs the heat passed from the air, leaving the air cooled so it can be delivered through the house via the ductwork. The refrigerant travels back to the compressor and starts the cycle fresh.
At Metro Express Service, we provide installation, maintenance, and repair for all makes and models of air conditioner units, including Lennox, RUUD, Trane, Coleman, and Amana. Contact our Arlington HVAC technicians today for quality repair and installation services.
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