Furnace repair. Intermittent heat call. Found the ignitor and flame sensor very corroded and working intermittently. Also found the evaporator drain cracked and not attached. Discussed all options with the customer. They decided to join our maintenance membership and have both parts replaced and the drain repaired for now. Performed tune-up and safety inspection on furnace, tested gas valve voltage and pressures. Cleaned all pressure switch hoses and inlets. The system is from 1993. Providing a customer with an estimate for a replacement due to age. The system is clean, heating, and operating adequately at this time. Performed free inspections. The customer will have a spring/ac visit of 2026 remaining on the current plan.