What Are HVAC Contactors and Why Are They So Important?

You know that your HVAC system needs electricity in order to run, but are you familiar with the electrical components inside it? Contactors are one of the components that help ensure your HVAC system has enough power to operate. Knowing more about HVAC contactors, including what they do and how to prevent problems with them, can help you understand your HVAC system better.

Function of an HVAC Contactor

The contactor in an HVAC system is a tiny device that controls the flow of power or electricity to various HVAC components. Contactors can provide components with power when needed or cut off power to components at times. Some of the components that contactors supply power to include the condenser, the motors, and the compressor.

How HVAC Contactors Work

Contactors remain off or in an “up” position when your HVAC system isn’t on. When this happens, electricity cannot flow to other components in your HVAC system. When you turn your air conditioning on or when your thermostat starts the cooling cycle, a small amount of voltage reaches the contactors. This voltage causes the contactors to turn on or move to the “down” position, which lets power move to different parts of your HVAC system. When the cooling cycle is done, another small amount of voltage reaches the contactors and causes them to turn off or go back into the “up” position again. This stops power from flowing to other HVAC components.

Problems with HVAC Contactors

What kinds of problems can occur with these contactors? They can burn out due to wear and tear or overheating, which prevents electricity from flowing through your HVAC system. These contactors can also become stuck in a down or up position if they’re worn out or dirty. Having routine HVAC maintenance done can help prevent problems from occurring with your contactors.

If you need more information on HVAC contactors, please contact NisAir Air Conditioning and Heating. Our HVAC technicians in Indian River, Palm Beach, and Martin counties can provide you with more details on your HVAC system and handle any repairs you need.