Quote to replace the failed heat exchanger in the Carrier package unit serial 0418P37954 marked as #5. The heat exchanger is rusted and cracked through at the top collector. The front burner support is also rusted through. The heat exchanger is covered by the factory warranty of 10 years until January 2028. The burner support, flame retainer, burner regulator and labor are not covered by the warranty and are the responsibility of the customer. All related parts are currently in stock locally.