Freelander 2 HEVAC issues

Hi all, newbie here. My Freelander 2 TD4 HSE HEVAC is giving me trouble. There is no heat coming from both sides and when switching on the heated seats, the lamp is very faint and nothing gets hot. It appears to be worse on the Driver's side and the fan isn't as strong as it used to be either. Also the window defrost isn't working anymore. Any advice please? Many thanks.

Best advice is to run a diagnostic on the HVAC system.