{"nhtsa_id":10228662,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2023-01-05","date":"2022-12-21","document_id":"07-004-22b","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM","mfr_system":null,"summary":"Some customers may complain the A/C blows warm. This may be caused by one of two things. Cause 1: After accelerating in hot weather, the A/C blows warm air for a longer time than other models. This is caused by improper control software of the PCM not allowing the A/C compressor to resume properly after acceleration. During a hard acceleration above a certain throttle level opening, the PCM stops the A/C compressor operation for better acceleration. It then resumes the compressor operation after the acceleration. To eliminate this concern, the control software of the PCM has been modified. Cause 2: Insufficient cooling performance at ambient temperature of around 68 °F (20 °C) in daytime. This is caused when both the ambient temperature and the cabin temperature are at around 20 °C (68 °F), auto A/C set at around 20 °C (68 °F) may not cool down the cabin temperature properly. To eliminate this concern, control software of the dash-electrical supply unit (Dash-ESU) has been modified.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10228662-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2022/MC-10228662-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10228662","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MAZDA","model":"CX-30","year_from":2020,"year_to":2022,"match":"exact","vehicle_ids":["2020_mazda_cx-30","2021_mazda_cx-30","2022_mazda_cx-30"]},{"make":"MAZDA","model":"MAZDA3","year_from":2019,"year_to":2022,"match":"exact","vehicle_ids":["2019_mazda_mazda3","2020_mazda_mazda3","2021_mazda_mazda3","2022_mazda_mazda3"]}],"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":[]}