Learn Which HVAC Part Is the Most Vital to Your Unit

While components of both heating and cooling systems work together to maintain indoor comfort and efficiency, each system has at least one particularly vital HVAC part that’s especially critical. These parts of the system may be fundamental for optimum performance and economy and/or essential for safe operation of the unit.

Often, a defect in a vital HVAC part means the system will no longer function until professional service technicians identify the problem and make the necessary replacement. Here’s a close look of a vital HVAC part in both the heating and cooling system, as well as what happens if it fails.

Furnace Heat Exchanger

The heat exchanger transfers heat generated by gas burners in the combustion chamber to the system airflow passing through the furnace. Heated air then circulates throughout ductwork to all rooms in the house. The heat exchanger also functions to keep dangerous fumes that are a byproduct of gas combustion — including deadly carbon monoxide — out of the system airflow.

A cracked furnace heat exchanger presents an urgent safety hazard. Having the heat exchanger inspected is an important part of annual furnace preventive maintenance provided by your HVAC contractor. If a crack or other fault is discovered in the heat exchanger, the furnace must be shut down until the component is replaced.

Air Conditioner Compressor

An air conditioner doesn’t add coolness — it removes heat. As heat energy is extracted from indoor air by the system evaporator coil, the compressor is the vital HVAC part that concentrates heat molecules in the AC refrigerant flow so indoor heat can be efficiently dispersed into outdoor air as refrigerant passes through the condenser coil.

The compressor is the most expensive single component in a central AC system. If the system warranty has expired, the high cost of replacing a worn-out compressor in an aging unit is usually not a good deal. Often the better option is to replace the entire air conditioner and benefit from improved efficiency and cooling performance, plus a new warranty.

For answers to questions about issues affecting any vital HVAC part, contact the experts at NisAir Air Conditioning and Heating.

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