Responded to a service call from a customer whose Lennox adaptive cooling and two-stage heating system we recently installed. She noticed a small leak coming from one of the exhaust pipes and wanted it checked right away. During the visit, we inspected the venting, verified the pitch and support, and traced the moisture to a loose connection at the exhaust joint. We tightened the fitting, applied proper sealant, and confirmed the exhaust was drafting correctly with no further leaks. The system is now operating safely and efficiently, and the homeowner is set for reliable heating this winter.