Home › Land Rover › 2021 › Defender 90 › Repair and Diagnosis › General Information › Specifications Index › Diagnostic Trouble Code Index DTC: HVAC Control Module (HVAC) -- Defender/L663 › Diagnostic Trouble Code Index - DTC: HVAC Control Module (HVAC) (G2400894) › Description And Operation › HVAC Control Module (HVAC) › DTC B14EA-96: Front Controls Interface Module - Component internal failure › Possible Causes