You’ll want to find a manufacture date. This is frequently found on a label on the exterior of your system.
If your unit is less than five years old, it could still be warrantied. Having said that, warranty terms and conditions vary between manufacturer and installing company.
At Roland J. Down Service Experts , we can confirm your warranty standing via a system inspection. We also provide HVAC service memberships in Albany for residential heating and AC units, regardless of system age or manufacturer warranty status.