Originally Posted by
MirageSEFan
...A/C will not work properly when idling in Park...blows mostly warm air
...in Drive, I don't notice any problem.
Are you saying that the AC is poor at idle when the car is sitting still, but it works fine once the car starts moving? If that's the case, then the first thing you need to do is what Fummins said and make sure your electric radiator fan turns on when the AC turns on.
What does the radiator fan have to do with anything?
You need adequate airflow over the condenser (that thing that looks like a second radiator) in order for the AC to function properly. The electric fan provides this airflow when the vehicle isn't moving. Once your car starts moving at a decent speed, there is plenty of airflow over the condenser and the airflow from the electric fan isn't required.
So pop the hood, start the car with the AC OFF, then have someone turn on the AC while you are looking under the hood. The electric fan should come on as soon as the AC turns on. Report back with your findings.
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View my fuel log 2015 Mirage ES 1.2 manual: 52.2 mpg (US) ... 22.2 km/L ... 4.5 L/100 km ... 62.6 mpg (Imp)