Now that's a good thought an after market A/C leftover parts, the module that's stuffed in the pipe is seriously jammed in, and very restricted on the airflow. I shall carry on taking the heater out, some of the facia parts have been glued in so it has been messed about with, the module in the pipe I have since found out has a date of 15/4/04.
If I find anything out I'll put another post up.