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So yesterday I was driving home from work in my 2018 focus st and I had ac earlier in the day and then all the sudden nothing blew about as hot as the heater and today I was hoping the problem would “magically” go away and it was a fluke and nope nothing still no ac checked pressure and it was good and pump kicks on and off as it should. I’m stumped called the dealership and I’m 1 month out of warranty so I’m coming to you guys before hand any common problems that I’m over looking or I should know of. I’ve always thought it didn’t blow as cold as it should as well even driving steadily down the free way.
 

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Mk2 RS MP350
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Losing refrigerant gas is always the most likely cause but the only way you can tell for sure is by evacuating the system and weighing it.
Does the pipe going to the evaporator feel cold?
 

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Mk2 RS MP350
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That's correct if you've lost all or most of the gas but not for smaller amounts.
That's why you weigh it.
A full charge is 600 grammes IIRC.
 
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