How do I know if I have an existing warranty on my furnace, air conditioner or HVAC system?Findthe label on the outer surface 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 change by manufacturer and the installing company. Strand Brothers Service Experts Heating & Air Conditioning can determine the warranty status of your heating and cooling system via System Inspection. We also offer a Platinum PLUSTM Protection Plan for home heating and air conditioning systems, regardless of the age of your equipment or manufacturer warranty status.