We can repair your faulty Jaguar XJ Heater Control ECU Module along with a 12 months warranty.
 
Common faults are:
No cold air on warm day
Air cool but not cold
Insufficient air, especially from centre vent
Hot feet and cold face or vice versa
Interior mists up after a few miles and air is stuffy
Cold draught on feet
Cold water drops on passenger's feet on right hand corners
Aircon controls do not work and cabin temperature never stabilises
One or both fans running only on 'High' or 'Demist', or one or both fans permanently running at high speed.