You’ll want to find a manufacture date. This is typically situated on a label on the surface of your system.
If your equipment is less than five years old, it may still be under warranty. Having said that, warranty terms and conditions differ manufacturer and installing company.
At Hammond Plumbing & Heating, we can confirm your warranty standing with a system inspection. We also offer HVAC service memberships in Kitchener for residential heating and air conditioning units, regardless of unit age or manufacturer warranty validity.