Hansberger Refrigeration Blog: Your AC Repair Resource

What Is the Most Vital Part of Your Home’s HVAC Unit?

Your HVAC system is made up of many different elements, all of them working together to keep your air a certain temperature and make you comfortable. What’s the most vital HVAC part, though? It’s hard to narrow it down to just one, but below are a few of the top contenders.

Heat exchanger.

On a furnace, this is the part of the system that warms cold air — a truly vital HVAC part. When your furnace burns its fuel (usually natural gas), the exhaust that’s released travels through a metal tube, also known as the the heat exchanger. The heat from that tube is then used to heat the air before it’s distributed to your home. Some models also include a secondary heat exchanger, which helps heat the air even more efficiently.

Condenser coil.

The condenser coil is to your AC what your heat exchanger is to your furnace. Part of the outdoor unit, it extracts the heat from the air and releases it outside, sending cool air into your home. When your refrigerant is compressed, it condenses and becomes cold. Air passing over the compressor is then cooled as well, and the cool air is sent through your ducts.

Blower motor.

It’s the blower motor’s job to distribute the air throughout your home. The motor powers a fan which blows the air across the heat exchanger or condenser and into your ductwork, where it flows to your registers. There are actually two different fans. One blows the air into your home and the other takes air from inside and blows it out of your home. Both are essential for maintaining good airflow and keeping your home comfortable.


While not a part of the HVAC unit, it’s still a vital HVAC part in the system as a whole. Your thermostat lets you set your ideal temperature for a certain area. It then monitors the temperature of that area and regulates how much air is sent to your home based on those temperature readings.

For help keeping every vital HVAC part in top shape, contact us at Hansberger Refrigeration and Electric Company. We keep Yuma’s home-comfort systems running smoothly and efficiently.