DTC B13F5-12: Electric (PTC) Heater Control Circuit #2 - Circuit short to battery: Action

WARNING: This page is about a different car, the 2020 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.

Refer to the appropriate system wiring diagrams and check the electric booster heater relay circuit for short circuit to power. Repair the wiring harness or install a new electric booster heater relay as necessary