Instructions for evacuating heating and air conditioning system
WARNING: This page is about a different car, the 2016 MINI Cooper Paceman, 2015 MINI Cooper Paceman, 2014 MINI Cooper Paceman, and 2013 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.
Before each filling, evacuate the refrigerant system.
Observe an evacuation time of at least 30 minutes.
The evacuation procedure removes all traces of ambient air, water vapor and any other gases present from the heating and air conditioning system. This enables subsequent system filling with refrigerant.
If the vacuum does not remain stable when the system is off, run the procedure for leaks in the refrigerant circuit.
During evacuation, set blower of heating and air-conditioning unit to middle blower speed. This ensures that evacuation is more effective since the pressure on the low pressure side increases.