{"nhtsa_id":10201395,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-09-13","date":"2021-07-21","document_id":"T-TT-0661-21","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:APPLIANCE:AIR CONDITIONER","mfr_system":null,"summary":"TT: Customer complaint of HVAC compressor ?Bang? type noise upon initial compressor engagement when air conditioning has not been operated for an extended period (~24 hrs. or longer). The noise is caused by compressor oil collecting in the compressor and upon initial compressor engagement, the compressor must pump the oil out causing the ?Bang? noise. Compressor engagements thereafter are normal and less audible as the collected oil has been pumped out.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201395-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201395-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201395","components":[{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"TOYOTA","model":"TUNDRA","year_from":2018,"year_to":2021,"match":"exact","vehicle_ids":["2018_toyota_tundra","2019_toyota_tundra","2020_toyota_tundra","2021_toyota_tundra"]}],"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":[]}