On the subject of heater controls .... my 1995 Plus 8 has simple flaps in the footwell, either side of the heater box, that can be opened and/or rotated to control the airflow into the footwell.
Problem is that the "tubes" that the flaps are attached to are very loose in the housing and won't stay where they're put.
I assume this is a common malady, is there anything that can be done ?
