You’ll want to look for a manufacture date. This is typically situated on a label on the surface of your unit.
If your system is less than five years old, it may still be warrantied. At the same time, warranty terms and conditions differ manufacturer and installing company.
At Stark Services, we can verify your warranty status through a system inspection. We also provide HVAC service memberships in Haltom City for residential heating and AC systems, regardless of unit age or manufacturer warranty standing.