{"nhtsa_id":10206172,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2022-01-07","date":"2021-12-06","document_id":"FDM-TSIB-031","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:CONDENSOR/EVAPORATOR; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL","mfr_system":null,"summary":"This bulletin provides instruction for relocating the AC system thermostat probe in the evaporator core to prevent AC system freeze-up. AC system testing was performed after receiving reports of system freeze-ups. Testing showed moving the location of AC system thermostat probe in the evaporator core improved overall system performance and reduced system freeze-up.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10206172-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10206172-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10206172","components":[{"id":"engine","name":"Engine","parent":null},{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"visibility","name":"Glass, wipers and mirrors","parent":null},{"id":"hvac","name":"Heating and air conditioning","parent":null},{"id":"labels-manuals","name":"Labels and manuals","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"MACK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}