Home >> Land Rover >> 2020 >> Range Rover SVAutobiography Dynamic >> Repair and Diagnosis >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: HVAC Control Module (HVAC) -- Range Rover/L405 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: HVAC Control Module (HVAC) (G2164849) >> DTC B1426-4B: Right Front Cooled/Heated Seat Thermal Electric Device #1 - Over temperature >> Possible Causes