{"nhtsa_id":10198451,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-06-28","date":"2021-05-21","document_id":"24-007-21","mfr_campaign":null,"replaces":null,"component":"VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; ELECTRICAL SYSTEM; VISIBILITY","mfr_system":null,"summary":"Flash: HVAC Diagnostic and System Updates This bulletin involves reprogramming the HVAC control module with the latest available software. The customer may notice one or more of the following:Intermittent change of smell or humidity level in vehicle. An intermittent blast of warm air when A/C is on. Intermittent increase of outside air through the HVAC system. In addition, the following software enhancement is also available:Improvements for customer concerns of 'cabin too warm', specifically in the mid ambient temperature range 4.5-15.5 °C (40-60 °F).","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10198451-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10198451-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10198451","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":"JEEP","model":"GLADIATOR","year_from":2020,"year_to":2021,"match":"exact","vehicle_ids":["2020_jeep_gladiator","2021_jeep_gladiator"]},{"make":"JEEP","model":"WRANGLER","year_from":2018,"year_to":2021,"match":"exact","vehicle_ids":["2018_jeep_wrangler","2019_jeep_wrangler","2020_jeep_wrangler","2021_jeep_wrangler"]}],"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":[]}