{"nhtsa_id":608420,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-11-24","date":"1999-07-12","document_id":"99144","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:APPLIANCE:AIR CONDITIONER","mfr_system":null,"summary":"VEHICLES MAY EXPERIENCE A MOANING NOISE HEARD AT APPROXIMATELY 1100 RPM WITH THE A/C COMPRESSOR ENGAGED. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/608420","components":[{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"F-150","year_from":1997,"year_to":1998,"match":"exact","vehicle_ids":["1997_ford_f-150","1998_ford_f-150"]}],"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":[]}