{"nhtsa_id":10233745,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-04-05","date":"2023-03-21","document_id":"SSM 51469","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM","mfr_system":null,"summary":"Some 2021 F-150 vehicles built on or before 01-Feb-2021, 2017-2020 F-150 vehicles equipped with a 3.5L EcoBoost engine, 2018-2020 F-150 vehicles equipped with a 2.7L EcoBoost or 5.0L engine, 2019-2020 F-150 vehicles equipped with a 3.0L diesel engine may exhibit a high pitched squeal or whistle type noise from the engine compartment after the engine is shut off. This condition may be due to the air conditioning (A/C) low side system pressure exceeding the high side pressure resulting in equalization of A/C system pressures through the A/C compressor. An updated A/C compressor has been released to resolve this concern. For claiming, use causal part 19703 and applicable labor operations in Section 11 of the Service Labor Time Standards (SLTS) Manual.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10233745-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10233745-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10233745","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":"F-150","year_from":2017,"year_to":2021,"match":"exact","vehicle_ids":["2017_ford_f-150","2018_ford_f-150","2019_ford_f-150","2020_ford_f-150","2021_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":[]}