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Heating & Cooling 3rd Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #1  
Old 08-31-2010, 04:17 PM
jonathanteller jonathanteller is offline
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Default AC compressor keeps cyling on & off 02 ram van

02 ram van . The problem is that the clutch keeps cyling on and off rapidly (1 or two times a second) whenever i work the engine . This is clearly bad for the engine let alone the compressor. I have to keep turning the ac off every time I pull away from a stop light or climb a steep hill .Normal gentle driving alows me to keep the ac on indefinitly. Having the fan setting on low greatly increases the problem . It seems to be getting too cold. Is this a cyling switch problem?

Last edited by jonathanteller; 09-01-2010 at 03:35 PM.
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Old 09-01-2010, 01:23 PM
City Slicker City Slicker is offline
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Old 09-01-2010, 03:29 PM
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Need to take it to someone that knows how to work on AC systems. Could be low on freon or other issues.
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Old 09-01-2010, 03:33 PM
jonathanteller jonathanteller is offline
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I was hoping to get advise from someone who knows dodge ac well. The problem is two years old and someone hooked up gauges and told me freon level is good. It's the clutch that is cyling on and off not the compressor
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Old 09-01-2010, 09:01 PM
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Quote:
Originally Posted by jonathanteller View Post
I was hoping to get advise from someone who knows dodge ac well. The problem is two years old and someone hooked up gauges and told me freon level is good. It's the clutch that is cyling on and off not the compressor
If the system pressure goes high the high cut out will cut power to the clutch. If the system pressue drops below the low cut out switch set point the power to the clutch is cut. The only way I know of telling in a system is full is to recover the 134a and measure the amount you recovered. I would lean towards your low on 134a. I would think that when the gauges are hooked up and you increase the RPM to 2000 or more you will see the low side gauge drop and the clutch will stop turning. If I recall that they call it short cycling. If this was my ride I would add some 134a. If your not 100 % sure on what your doing on an A/C system...Do not attempt to mess with it. 134a can be nasty if you get in your eye or eyes (blinds) or on tender skin.
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Old 09-02-2010, 10:35 PM
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Thanks for the advice! I'll add some more 134a(carefully) and see if this makes any difference.
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Old 09-19-2010, 06:50 PM
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No difference. Clutch keeps cyling, sometimes as much as 3 times a second
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Old 09-19-2010, 07:04 PM
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Quote:
Originally Posted by jonathanteller View Post
I was hoping to get advise from someone who knows dodge ac well. The problem is two years old and someone hooked up gauges and told me freon level is good. It's the clutch that is cyling on and off not the compressor
The clutch is the compressor . When the clutch engages to the pulley it drives the compressor . I would have to say it's low on refrigerant or you may have a bad cycling switch .
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Old 09-19-2010, 07:06 PM
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Whats your pressure readings ?
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