{"nhtsa_id":612792,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-06-12","date":"2000-01-01","document_id":"13764","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM","mfr_system":null,"summary":"SOME VEHICLES BUILT BETWEEN 8/14/99 AND 11/16/99 MAY EXHIBIT SHIFT ON THE FLY ENGAGEMENT/DISENGAGEMENT ISSUES OR HEATER/AC ONLY BLOWING OUT OF THE DEFROST MODE. *MJS","document":null,"url":"https://open.wenmarpro.com/bulletins/612792","components":[{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"EXCURSION","year_from":2000,"year_to":2000,"match":"exact","vehicle_ids":["2000_ford_excursion"]},{"make":"FORD","model":"SUPER DUTY F SERIES","year_from":2000,"year_to":2000,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}