How do I know if I have an existing warranty on my furnace, air conditioner or HVAC system? Find the label on the exterior of the system component for a manufacture date. Equipment less than five years old may have a warranty, but also may not depending on the model. Warranty terms and conditions differ by manufacturer and the installing company. Service Experts Heating & Air Conditioning can figure out the warranty status of your heating and cooling system via System Inspection. We also offer a Platinum PLUSTM Protection Plan for residential heating and air conditioning systems, regardless of the equipment age or manufacturer warranty status.