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As some of you may know, I sold my 02 rcsb a few months back and replaced it with a 2005 GMC Sierra crew cab. When I first got the truck, the air-conditioning didn't seem as cold as I thought it should. The A/C in my 02 used to freeze me out of the truck on high. For that reason, I took the 05 in to get gassed up. IIRC, it was slightly low, so after vacuuming it out, they filled it back up per GM spec. Since I bought the truck in Feb, I haven't really had many days where I use AC. It's now getting in the 90s in here SC and time to start turning on the AC.
I've noticed in the few months that I've had it, the air blows warm intermittently (with the A/C on). The truck has the digitial dual-climate control. Sometimes, when I turn the AC on, it will blow cold, other times it will blow warm. The kicker is ALL of the vents do it, not just one side like the issue with the blend doors. I can turn the truck off and start it back up, and SOMETIMES this will fix the issue. Other times, it will just keep blowing warm air. I haven't really paid much attention to it until today, but I did notice that when the air was warm, the compressor wasn't on. As soon as it did kick on, the truck started to cool down. I was going to jump the low-pressure switch on it tonight to see if it would work, but of course, I couldn't get it to blow hot air. :guns:
Also, I'm not sure if this is related but I'm starting to think that it may be. It seems like the efans on this truck run more often at idle than the 05 efan setup that I had on my 02 (yes, even using the same tables in EFILive). I'm wondering if one of the pressure switches is bad and is causing the A/C compressor to kick-off (and also activating the 2nd efan via a/c pressure).
Any help is appreciated! I need cold air. :bawl:
I've noticed in the few months that I've had it, the air blows warm intermittently (with the A/C on). The truck has the digitial dual-climate control. Sometimes, when I turn the AC on, it will blow cold, other times it will blow warm. The kicker is ALL of the vents do it, not just one side like the issue with the blend doors. I can turn the truck off and start it back up, and SOMETIMES this will fix the issue. Other times, it will just keep blowing warm air. I haven't really paid much attention to it until today, but I did notice that when the air was warm, the compressor wasn't on. As soon as it did kick on, the truck started to cool down. I was going to jump the low-pressure switch on it tonight to see if it would work, but of course, I couldn't get it to blow hot air. :guns:
Also, I'm not sure if this is related but I'm starting to think that it may be. It seems like the efans on this truck run more often at idle than the 05 efan setup that I had on my 02 (yes, even using the same tables in EFILive). I'm wondering if one of the pressure switches is bad and is causing the A/C compressor to kick-off (and also activating the 2nd efan via a/c pressure).
Any help is appreciated! I need cold air. :bawl: