You’ll want to check for a manufacture date. This is usually situated on a label on the surface of your equipment.
If your unit is less than five years old, it could still be protected by a warranty. At the same time, warranty terms and conditions differ manufacturer and installing company.
At Church Services, we can check your warranty standing via a system inspection. We also offer HVAC service memberships in Houston for residential heating and air conditioning units, regardless of unit age or manufacturer warranty validity.