2000 Silverado 1500 5.3 Ac blows cold for about 45 to hr then gets warm

[charlesbwright]

I have 2000 silverado 1500 with around 218k miles on it. The other day getting off work turn my truck on and ac was blowing cold like normal continued on everyday normal rountine, well 10 15 mins later stuck in traffic on interstate. Realized ac was blowing warm so i turned ac off waited 5 or 10 mins turned back on and was cold as usual.Long story short still having this problem, wondering what it could be causing this.

 

Btw new to the forum any info would be appreciated. Thanks

[Dcarls22]

Having the same issue with my 06 4.8 but I have to turn off and turn on the truck most the time to get it back to cold been told it might be the blond door that is causing in but I don't know much about a/c so I couldn't twll you from experience just from hear say

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[qwank]

replace the pressure sensor on the side of the accumulator 

[silveradosid]

check the water drain might be plugged

[txab]

On 7/1/2018 at 3:03 PM, Dcarls22 said:

Having the same issue with my 06 4.8 but I have to turn off and turn on the truck most the time to get it back to cold been told it might be the blond door that is causing in but I don't know much about a/c so I couldn't twll you from experience just from hear say

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From your description, you do have a  blend door issue

[txab]

On 7/1/2018 at 2:37 PM, charlesbwright said:

I have 2000 silverado 1500 with around 218k miles on it. The other day getting off work turn my truck on and ac was blowing cold like normal continued on everyday normal rountine, well 10 15 mins later stuck in traffic on interstate. Realized ac was blowing warm so i turned ac off waited 5 or 10 mins turned back on and was cold as usual.Long story short still having this problem, wondering what it could be causing this.

 

Btw new to the forum any info would be appreciated. Thanks

Check the cycling switch first. Check compressor clutch air gap for being excessive next. May also have a weak fan clutch when hot. While engine running, in park, AC on, after compressor kicks off but has not re-engaged, carefully tap the the clutch face with a soft mallet or piece of wood etc..... Note what happens. On compressor this age clutch gap is probably way excessive. Should only be about the thickness of a business card to the thickness of a credit card at most