04 Air Conditioner Issue
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5th Wheeling
Joined: Jun 2002
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04 Air Conditioner Issue
Looking for a little input from you all. My Wife's 04 Exp recently started having a wierd problem with the A/C. Lately after the truck sits a while, when it is turned on it will blow but not cold. Then after a random amount of time, sometimes 5 mins sometimes 20mins, it will begin working and works great blowing very cold. In checking it out when it is warm the compressor is not turning.
What exactly tells the system to crank the compressor? Is there some sorta sensor?
Any help would be greatly appreciated
Barry
What exactly tells the system to crank the compressor? Is there some sorta sensor?
Any help would be greatly appreciated
Barry
Posting Guru
Joined: Aug 2007
Posts: 1,079
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From: Fort Wayne, IN
Ok so you have rear AC. Turn on your main unit, then turn on your rear to max. Does it get cold near immediately? (could take about 30 seconds for fluid to flow). Is the front still warm at this time?
Posting Guru
Joined: Aug 2007
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From: Fort Wayne, IN
Ok so that guarantees that your compressor isn't kicking on. I would say that you either have a bad AC relay, or a bad compressor. Check the relay first, see if it's clicking and sending power.
Former Vendor
Joined: Jan 2006
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From: Seattle
But do you have manual a/c or eatc? Manual a/c has three ***** on the control panel while eatc has all push buttons. If you have eatc the system will not blow cold if the temperature inside the vehicle is below the temperature you have selected on the control panel, I.E. you selected 65 and the temperature in the vehicle is 60. If you have manual a/c then you have a problem with the system controls and you will need to do some diagnostic work to determine the problem. Dan.
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Posting Guru
Joined: Aug 2007
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From: Fort Wayne, IN
But do you have manual a/c or eatc? Manual a/c has three ***** on the control panel while eatc has all push buttons. If you have eatc the system will not blow cold if the temperature inside the vehicle is below the temperature you have selected on the control panel, I.E. you selected 65 and the temperature in the vehicle is 60. If you have manual a/c then you have a problem with the system controls and you will need to do some diagnostic work to determine the problem. Dan.
Well his rear A/C would work at full potency regardless of the eatch or manual. My truck has EATC and it's rear A/C is controlled separate, ie if you set it to the maximum cold then it will blow maximum cold even if you have the temp set so high on the front nothings running.
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Posting Guru
Joined: Aug 2007
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From: Fort Wayne, IN
), but I believe your compressor can become frozen (not in the cold sense, but where it can't turn). However I believe if this happened your serpentine belt would shred itself on the immobile pully.Possible too I guess that something could be faulty in the compressor that connects the shaft to the rotating pully when you engage it. Kind of like the vacuum pump on the hubs of electronic shift 4x4's fails.
Posting Guru
Joined: Aug 2007
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From: Fort Wayne, IN
Wait..what? If your engine belt is turning so is your compressor...your compressor shaft is *always* turning. It's the systems of the truck that engage the shaft of that always turning pully on the inside of that compressor to actually make the compressor do load. If that belt is just sliding over the compressor pully and that compressor pully isn't turning with the belt, then your compressor is freezing up in a on state. BUT YOUR COMPRESSOR PULLY, BELT, AND EVERYTHING ATTACHED TO THE BELT ALWAYS TURNS AT ALL TIMES WHEN THE ENGINE IS RUNNING. If this is not the case, you have a serious problem.
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5th Wheeling
Joined: Jun 2002
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I'll need to look again, but that is what it looked like when I checked it out before. I am probably just being stupid though. I was not using a flashlight, just sunlight when I looked. I was pretty pissed at the time too
Posting Guru
Joined: Aug 2007
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From: Fort Wayne, IN
I pray for you it's turning. If it's not turning, then your built is going to very soon need replaced. Also that means that your compressor may have internally exploaded, which can mean your entire A/C system will need to be replaced unless metal didn't make it very far..
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