HSA provides the convenience of one source for most repairs. When a covered failure occurs, all you have to do is contact HSA. You can call our toll-free number or request service online. We have customer service representatives available 24 hours a day, 7 days a week who will discuss the failure with you and work with you every step of the way. We understand the importance of timely repairs when a system or appliance breaks down. HSA provides qualified, prescreened service contractors from its Preferred Vendor Network to diagnose the failure. If an HSA service provider cannot respond in a timely manner, HSA will approve the use of a contractor outside its network to ensure the convenience of fast service. It's our guarantee!