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2nd Gen Non-Engine/Transmission 2001 A/C ports?

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Engine/Transmission (1998.5 - 2002) Adapter plate

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I'm many miles away from my service manual, and want to add some R134a refrigerant to my air conditioning system. Can someone verify which system port is the low pressure side?



I've located both ports - there's one at the front of the truck, just behind the condenser, and the second one is near the firewall, a short distance from the dryer/filter.



Both ports have the labeled covers (one L and one H), but I want to make sure a tech didn't swap the covers inadvertently on a previous service. I'd hate to blow up my cheap can of refrigerant.



Thanks for any help,

John
 
BTW, you needn't worry; the connectors are of different sizes, as are the dust caps. The gazinta hose can only be connected to the low-pressure fitting.
 
BTW, you needn't worry; the connectors are of different sizes, as are the dust caps. The gazinta hose can only be connected to the low-pressure fitting.



Now, this I did not know. This will be the first time I've recharged on my own.



I had my Dodge system serviced about a half-dozen times by the dealer while covered under extended warrantee. They replaced evaporator, condenser, and finally the compressor, plus numerous recharges with dye, oil, and sealant. Dodge made the offer for compressor replacement after the warrantee period had expired. I was paying a deductible at each service, and the dealer techs never did solve the leaking system problem. Dodge made the offer as if they were doing me the biggest favor ever offered to a vehicle owner, telling me this would be their final offer. After 3-4 years of service calls, with a deductible payment for each, I decided I would just buy the relatively cheap refill cans at Walmart and top off the system every season.



It might even pay to buy a manifold and hose set - after a while, I may have to vacuum the system again.



Thanks for all replies,

John
 
The service ports are very common A/C leaks on these trucks. As posted a week ago in this forum, I replaced both of mine for $15. Be carefull topping off the system. A little leak will always turn into a big one. Also, it's VERY hard to know if you have the correct refrigerant charge just by adding an unknown amount and only watching the low side pressure. I'm fully in favor of repairing everything I own on my own. However, it might save you a little coin in the long run to have someone with the right tools and experience help you find the source of the leak.
 
Accumulator

Same scenario on my 99'. Check the accumulator cycling switch and make sure it's tight. Mine was barely finger tight and probably allowing a very slow leak. I replaced the switch and everything seems to be fine. Good luck.
 
Accumulator cycling switch

Same scenario on my 99'. Check the accumulator cycling switch and make sure it's tight. Mine was barely finger tight and probably allowing a very slow leak. I replaced the switch and everything seems to be fine. Good luck.



Where would I find this switch? My AC is blowing hot air (again) and I need to put some r-134 in it. I have had the service tech at my local dealership hunt for the leak with no luck. Their answer is just to replace everything at about $1200. 00... . no thanks.
 
The accumulator is mounted on the firewall ( passenger side ) directly beside the PCM. You'll see the A/C line going in and out. The switch is mounted on the top; just give it a little twist to check for a seal. Be careful to not over tighten.
 
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