Performed Platinum Comfort Club Membership Tune-Up on Heating System furnace is a 1989 sneider general furnace. customer does not have AC. inspected heat exchanger, metal of heat exchanger appears to be starting to warp but do not see any cracks. advised customer that the warpinh will eventually turn into a crack. advised customer of the age of the equipment, recommend replacing due to age and condition. overall system passes inspection but is very rusted due to age.