Yes, installation directly affects the manufacturer’s warranty of an aircon, and most brands sold in the Philippines explicitly state in their warranty terms that the warranty is valid only if the unit is installed by an accredited or authorized technician following the manufacturer’s installation guidelines. DIY installation or work done by an unaccredited installer can void the warranty entirely, leaving the unit owner responsible for all repair and parts costs even if a defect occurs within the warranty period. To protect your warranty, always use the installation service provided by the brand’s authorized dealer or service center, keep the installation documentation and warranty card, and register the unit with the manufacturer if an online or card-based registration process is available.