You’ll want to look for a production date. This is frequently situated on a label on the exterior of your equipment.
If your system is newer than five years old, it could still be under warranty. Having said that, warranty terms and conditions differ manufacturer and installing company.
At Service Experts Heating & Air Conditioning, we can verify your warranty standing via a system inspection. We also offer HVAC service memberships in Livermore for residential heating and AC units, regardless of unit age or manufacturer warranty validity.