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a/c cold to warm

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Old May 23, 2024 | 01:31 PM
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a/c cold to warm

So my a/c will blow cold and fine for a while, but then after a while 'sometimes' it'll start blowing warm as if the compressor stopped. If I checked, the low side line will be warm/hot unlike cold and wet [from humidity] when running normally. Would this be along the lines of needing to add refrigerant or needing to let some out? I know it was overcharged at the end of last summer and some was taken out. I'm thinking it's still a bit overcharged.

2004 5.4
 
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Old Jun 1, 2024 | 12:17 AM
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Had a car doing that once, was the evaporator freezing and becoming blocked, so I'd turn to vent and it would still cool air as the ice melted. Was a thermo sensor issue.
 
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Old Jun 2, 2024 | 09:24 AM
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you need to know the low and high side pressure before you do ANYTHING.
 
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Old Jul 3, 2024 | 09:49 AM
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Originally Posted by steve(ill)
you need to know the low and high side pressure before you do ANYTHING.
I know the high side pressure is higher than normal. I added a bit of freon and its better. Also wonder if barometric pressure has an effect.
 
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