Airflow on one of the dashboard duct vents is not blowing cold as it is on the other three ducts. Can it be that a hose has somehow become disconnected ? I have been searching for a diagram without success. Comments appreciated.
Do you mean the airflow is different than the other three or just the temp? Because if its just the temp and you are using a/c then the system is probably low on charge and has a leak. Recharge the system and see if the temps even out. If it is flow check to make sure the manual shutters for the airflow are not broken this can cause a slight blockage and air restriction.
Airflow is equal on all four dashboard vents. Cold air flows (with the A/C on) from the two driver side vents (only). No cold air flow from the two passenger vents. I will recharge the system to se if that rectifies the problem.