You’ll want to check for a production date. This is usually situated on a label on the surface of your unit.
If your equipment is newer than five years old, it could still be protected by a warranty. Having said that, warranty terms and conditions differ manufacturer and installing company.
At Strogen's Service Experts, we can check your warranty standing through a system inspection. We also offer HVAC service memberships in Rochester for residential heating and air conditioning systems, regardless of equipment age or manufacturer warranty standing.