You’ll want to find the date it was made. This is frequently situated on a label on the outside of your equipment.
If your system is newer than five years old, it might still be protected by a warranty. Having said that, warranty terms and conditions differ manufacturer and installing company.
At Neal Harris Service Experts, we can confirm your warranty status via a system inspection. We also have HVAC service memberships in Kansas City for residential heating and AC units, regardless of equipment age or manufacturer warranty validity.