2001 dodge ram ac problems

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Old 06-02-2012, 01:08 PM
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Default 2001 dodge ram ac problems

Long story short 01 ram 5.9 blows hot air thought it needed charged hook up refrigerant can and the gauge is off the charts it reads like 110 psi which is in the warning area its supposed to be like 55psi.. this was with truck on, max ac on and on the low port of the system.... im burning up help lol
Old 06-02-2012, 01:13 PM
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With the system off and full both pressures equal out. 110 is about right with the system off. Inop ac isn't always a refrigerant problem. Not trying to be rude but if you don't understand how ac works do yourself a favor and pay someone to diagnose it for you
Old 06-02-2012, 01:28 PM
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The thing I hate about the cans you can buy at any parts store is if your system is so low the ac compressor isn't engaging then you probably have a leak and simply recharging it won't fix it. Any thing claiming to have some kind of stop leak in it is garbage IMO and I would never put in a vehicle. If the system is completely empty then there is air in it and you need to pull a vacuum on it before recharging.
Old 06-02-2012, 01:59 PM
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Originally Posted by t_raven
With the system off and full both pressures equal out. 110 is about right with the system off. Inop ac isn't always a refrigerant problem. Not trying to be rude but if you don't understand how ac works do yourself a favor and pay someone to diagnose it for you
truth
Old 06-02-2012, 02:06 PM
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110 is too high with the system off unless its like 90 degrees or hotter
Old 06-02-2012, 02:07 PM
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P.s. too high of pressures could likely kick off the compressor.. did u verify the compressor runs?
Old 06-02-2012, 02:53 PM
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Originally Posted by t_raven
With the system off and full both pressures equal out. 110 is about right with the system off. Inop ac isn't always a refrigerant problem. Not trying to be rude but if you don't understand how ac works do yourself a favor and pay someone to diagnose it for you
What do u mean by the system off i stated it was on high while tryin to add it.
Old 06-02-2012, 02:53 PM
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Originally Posted by 99YENKO
110 is too high with the system off unless its like 90 degrees or hotter
I was assuming the compressor was off but realized he didn't specify. If your compressor was spinning and you're low side was that high the only time I've ever seen low side pressure that high is if the compressor is bad, you would have low high side pressure as well. Basically if a compressor is spinning and working properly high side goes up and low side goes down. When both stay close to static pressure it's usually a bad compressor. You really need both gauges to know what's going on. And with r134-a pressure is not a good indicator of how much of a charge you have. Evacuating and recharging is the only way to know you have a proper charge.

As far as 110 being too high for static pressure, I had to look up a chart but 93 degree is about where you'd see 110 psi, but even if it were much colder outside the engine bay could be way hotter than ambient air
Old 06-02-2012, 02:54 PM
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The ac worked great and slowly got hotter and hotter that's why I thouhht it was refrigerant
Old 06-02-2012, 02:55 PM
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Originally Posted by TermnEatr
What do u mean by the system off i stated it was on high while tryin to add it.
I mean even with the switch on, if the compressor wasn't spinning then pressure equalizers on both sides. Was the compressor spinning?
Old 06-02-2012, 03:18 PM
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Ah I see i haven't got to look at it much im not home ill check it out later and update thanks man.
Old 06-02-2012, 03:29 PM
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Originally Posted by TermnEatr
Ah I see i haven't got to look at it much im not home ill check it out later and update thanks man.
No problem. If the clutch is not engaging and low side pressure was that high then it's an electrical problem. Even if your charge was low but had enough to read that much pressure the clutch would come on and kick back off and cycle kinda fast like that. If I remember right those compressor clutches have 2 wires, power and ground (some only have a power wire and ground through the case). If it's not engaging check power and ground at the clutch and we can go from there.
Old 06-02-2012, 05:02 PM
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Does the A/C get colder at highway speeds? If it does then it is going to be your condenser/fan.
Old 06-02-2012, 07:06 PM
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Make sure you don't have a ******** friend who pulled the relay, stuck it upside down, and closed the fuse box.

That was a hot summer.
Old 06-02-2012, 07:13 PM
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Well the clutch is not engaging at all I checked the fuse and it was blown so I replaced it still nada.... If the clutch Locked up ir went out would that cause the fuse to blow?
Old 06-02-2012, 10:58 PM
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If its a 10 amp fuse that was blown then the clutch coil is bad
Old 06-02-2012, 11:38 PM
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does the compressor spin over by hand?
Old 06-03-2012, 08:15 AM
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Haven't tried to spin it I will later and yes the 10 amp was blown
Old 06-03-2012, 12:47 PM
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Yes it spins by hand not the relay either so I'm guessing the clutch is out guess ill just go ahead and get the whole assembly

Last edited by TermnEatr; 06-03-2012 at 01:40 PM.
Old 06-03-2012, 04:14 PM
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I agree with the clutch coil being bad. If u can replace it, time to do so


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