{"nhtsa_id":10201080,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-09-05","date":"2021-08-19","document_id":"21B05","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"After extended idling, the high-speed cooling fan relay may fail in some of the affected vehicles. A failure will cause the fan to either continuously run or never turn on. A continuously running fan will increase the temperature of the relay’s connections (terminals) to beyond their design maximum. This may eventually create an electrical arc which heats and damages the relay terminals. Customers may experience a drained battery and a non-functional or even a melted/burned high-speed cooling fan relay inside the battery junction box (BJB). A damaged non-functional relay causing the fan to never turn on, may lead to engine overheating at idle.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201080-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201080-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201080","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"FORD","model":"EXPLORER POLICE INTERCEPT","year_from":2016,"year_to":2018,"match":"base","vehicle_ids":["2016_ford_explorer","2017_ford_explorer","2018_ford_explorer"]}],"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":[]}