You’ll want to look for a production date. This is typically situated on a label on the outside of your unit.
If your equipment is under five years old, it might still be protected by a warranty. However, warranty terms and conditions vary between manufacturer and installing company.
At Abbey Air Home Services by Enercare, we can confirm your warranty standing via a system inspection in Oakville for residential heating and air conditioning units, regardless of unit age or manufacturer warranty status.