Question about Dodge Durango

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Good Morning. I have a 2005 Durango, Limited, 5.7L w/ front and rear ac units. Have recently purged the AC system and added the 2.50lbs of R134 spec'd for the vehicle. Rear AC blows cold, and Front AC even set at "Low" does not seem to be even close to where it should be temperature wise whether in the recirculate mode or not? Compressor is working, fan increases and decreases with speed adjustment, when in recirculate, what seems like an additional blower mode also can be heard. I have heard of problems with a "flap" or "door" not closing that could lead fromt he heater core into the ductwork allowing warm air to mix, is this something I can access and manually check and flip into the correct position? Any other suggestions? Thanx- Mike

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Hello morning !! The reason u mention is true and many do have same kinda problems other reasons can be
1.As u have not mentioned about the condenser..common problem!usually is condenser at front of car in front of radiato when you run your air conditioning the condenser in front of your radiator gets very hot. This causes your coolant temperature to rise. If the single cooling fan cannot keep enough air flowing through the condenser and radiator, your engine will overheat. Plus if enough air is not flowing through the condenser to keep it cool, the pressure in your AC system will get very high. This could damage your AC compressor.

2. Also check the vaccum lines to the blend door and make sure that the heater core is not clogged

for example 2001 Dakota- resistors in mine have burned out 3 times check the wiriing harness under the dash near the fan and see if it's smoked. Dealership has no clue why this would happen. If I don't run the fan on HI it's not a problem.

Posted on Jun 29, 2009


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Does the rear ac line have it own recharge system

No it doesn't. You'll have to add refrigerant. dual systems just take more.

Aug 31, 2014 | 2005 Dodge Durango

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I have a 2004 Dodge Durango 2 wheel drive limited edition 5.7 Hemi and have an AC problem Rear air works ICE cold front WILL NOT blow Had been working intermittently and has now stop working COMPLETELY...

2004? moderno ? could be anything here ,i think you may have a gas problem here ,not enough gas ,twin AC units hold around a kilo of gas singles around the 500/600 grms you would need a machine to drain gas then measure weight and refill to eliminate the problem .if gas ok then the flute valve which later systems use inside the high pressure pipe .earlier AC had a big bulky block/valve assembly .look if not sure ask a local garage to have a look .This is not a DIY home mechanics thing .that R134A gas is very dangerous so dont play

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How many pounds of r134 and how much oil ozs.

somewhere around 1.6 pounds (1lb.14ounces) of R134a if system is evacuated and 3 ounces of oil with new compressor.
keep pressure on the low side around 34-37psi & it should blow snow. Below are normal car AC pressure readings with 134A.
  • Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI
  • Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI –
  • Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.
DIY recharge kit:
With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold – STOP don’t overcharge the system.
Thank you for using fixya and be safe.

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Vent door cable or actuator broken or malfunctioning.

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I think you have a leak. I would get some dye . The local auto parts store sells it with a black light. Then check for leaks .

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Newer vehicle come with R134 vs R12. Since the two are not compatible, R134 has larger fittings. AC system has two ports, High and Low. Low is return to AC Compressor and high is output. High port is first following line from compressor to condenser (condenser is at front of vehicle like a second radiator). Keep following line till you find high port (paint cap red). Second port is low (paint cap blue).

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first the a/c system need to be put into a vacuum before you add r134. how much r134 does you system need? too much or too little will both get you warm air. does the compressor come on? air in the system will get you warm air too.

good luck

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2005 Dodge Durango won't blow cold in front!! Rear air works fine

you are bodging it and as you dont know anything about the A/C system then leave well alone and get it done with a machine.the whole system needs to be evacuated oil drain needs to be measured then refilled with the correct grade of oil and then regassed with the correct WEIGHT of gas and possibly a leak sealer added using special equipment.If it still doesnt work properly then it needs draining again and the venturi valve removing and checking out on the front unit.This is a specialised job for highly skilled operatives with the right equipment

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