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What determines the temp. in an a/c unit?

Damien89 on Thu July 12, 2012 11:22 AM User is offline

Year: 2009
Make: Ford
Model: Transit 17 seater
Engine Size: 2.4
Country of Origin: Malta

Hi, i am new here,

have a question, what determines the temperature of an a/c system? Is it the size of the compressor, the evaporator, or the condensor? Or is it determined by all of them together?
If an a/c system isn't producing a cold enough temperature what is the most typical choice of the 3 that i need to upgrade?

I am asking this as yesterday i drove a 17 seater ford transit minibus that had an a/c system fitted by a local company, although yesterday was the hottest day of the year (43*c) i drove reasonably ok (could have been better) with the a/c but i felt that the cold air coming from the vents wasn't as cold as it should be,

Today i had a ride in a similar van but this one had an a/c system from the factory and it felt the same temp. was coming out of the vents, my father just bought a 17 seater ford transit and needs to fit an a/c system, what can he do to make the temp. coming out from the vents colder? What is the thing that could be upgraded for colder temp?


mk378 on Thu July 12, 2012 11:27 PM User is offline

Mobile systems are typically limited by the condenser. There just isn't enough space to make it optimal.

With aftermarket systems, particularly on diesels, the pulley ratios might not be optimal. They need to be set up properly to get as much rpm to the compressor as possible. In a properly designed system, the engine and compressor should reach their respective maximum "redline" rpm at the same time.

Edited: Thu July 12, 2012 at 11:28 PM by mk378

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