Completed with heat 3 on carrier 2 ton upstairs 1999 and american standard 2018, all furnaces heating at this time of check up. Carrier furnace in very bad shape due to age and components showing wear, american standard units flame sensors will need to be replace very soon. Customer requested pricing to replace upstairs complete unit. 12% off approved my owner for 1 week only. Customer still needs to get more bids.