Home › Jaguar › 2018 › XF S, RWD › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATCM) -- XF/X260 › Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATCM) › Description And Operation › Automatic Temperature Control Module (ATCM) › DTC B10AF-13: Blower Fan Relay - Circuit open › Possible Causes