You’ll want to check for a manufacture date. This is frequently situated on a label on the surface of your equipment.
If your system is newer than five years old, it may still be under warranty. However, warranty terms and conditions vary between manufacturer and installing company.
At McKinley Heating Service Experts, we can check your warranty standing via a system inspection. We also have HVAC service memberships in Edmonton for residential heating and cooling equipment, regardless of unit age or manufacturer warranty validity.