You’ll want to check for the date it was made. This is frequently located on a label on the outside of your system.
If your system is less than five years old, it could still be protected by a warranty. At the same time, warranty terms and conditions vary between manufacturer and installing company.
At Wesley Wood Service Experts, we can check your warranty standing with a system inspection. We also have HVAC service memberships in West Chester for residential heating and AC units, regardless of system age or manufacturer warranty status.