Question about 1997 Dodge Caravan

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My ac is not blowing cold air, so i tried to re charge the compressor , but the compressor is not pumping,i did this while the engine is running and the ac is on with the fan fully on, still no cold air . what is wrong ?

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  • Dodge Master
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You need air conditioner manifold gauge set.that will tell you a lot.you could have moisture in system or you have accumulator - evaporator- or evaporator pressure regulator problems.

Posted on Jul 15, 2009

  • Jonah Oneal Jul 15, 2009

    if your compressor not working.check to see if compressor is receiving power.if not check AC compressor fuse and relay.if yes AC compressor is receiving power.the compressor clutch coil is open.or the epr valve not working.if not familiar with working with AC UNITS.LET GARAGE REPAIR IT.BECAUSE 134-R IS DANGEROUS IF GET IN YOUR EYES OR INHALED.

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You could have a bad a/c switch inside

Posted on Jul 15, 2009

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Air blows warm out of my a,c unit


The first thing to do is see if the AC compressor on the engine is running and if it is check to see if the larger of the two lines from the compressor is cold, if it is not cold and the compressor is not running then you have lost the charge of refridgerant due to a leak, if it is cold and AC compressor is running then the door inside the dash called the "Blend door" is stuck in the heated air position and you must replace it and the actuator that moves it.

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A mechanic would check the system with a set of pressure gauges. If the compressor is running, the low side would read around 30psi and the high side would be around 250psi. That is how you know if the system is full of freon or not.
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You need to hook up a set of AC pressure gauges to the low side charging port and read the system pressures with the AC compressor turned on and running, it should be around 28-32 PSI. If the compressor press is correct you have some other problem like a broken air temperature control blend door inside the dash air ducting.

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same to you, but i just change my ac compressor by myself. just bought a verey cheao compressor clutch from hexautoparts.com and intalled it with my friend. so cool, winter is coming now...

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I have a 2000 Dodge Ram 1500 that will blow cold and hot air for only a few minutes. After that is only ambient air temps. It is a 5.7 ltr, automatic with only one set of climate controls. The heater core...


you say it will blow cold and hot air for only a few minutes. You don't say but I assume you mean will blow cold a few min. when turned on AC max , blow hot only a few min. when turned to heater hot. Assuming thats the situation and you say AC charged and shows good on the low side -you should charge the AC to a full charge on the low side will cause problems with the AC air compressor kicking on and off. I suggest while the engine is running and turned to AC cold max watch the AC air compressor clutch to see if it does indeed kick on and off if so charge completely. As far as the heater make certain you coolant is all the way to the top and the best way to do this is when engine is completely cold remove radiator cap and fill completely and completely close cap then fill overflow container just to the cold level. That should fix your problem.

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1 Answer

Compressor turns, holds a charge but does not blow cold air even when I turn on the outside air it blows warm air


OK, this is air-conditioning 1-0-1

You say that i holds a charge, and the compressore turns, but does the comprressor cycle on and off, as this is indicating that there is enough charge, and once there is low pressure detected, it turns the compressor on, and when it reaches a high pressure, the compressor cycles off.

Lastly, when engine running and AC on, if you feel the 2 pipes going in to the firewall, one should be hot, the other should be cold ???...is this happening ???

Mar 28, 2011 | Ford F-150 Cars & Trucks

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The ac in my 2006 dodge 2500 gas engined truck does not blow cold when the engine is at idle. when running normal speeds the air gets cold


start by cleaning or replacing your in cabin air filter. check to see if your AC condenser fan is turning when the AC is turned on. Make sure the front of the radiator is not clogged with bugs, mud, etc. Check AC compressor relay-make sure the compressor clutch is turning the compressor with engine at idle. lastly check for proper refrigerant charge.

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1 Answer

My 2002 Expedition air conditioner will sometimes blow hot air and others cold air


I would check the following possibilities:
1. Is compressor clutch working? - You need to do this when the ac is blowing hot air only - locate compressor drive pulley on engine - rubber belt wraps around it. Start engine and set to max ac. When the ac is blowing hot air, look at the center of the compressor drive pulley using a good flash light - watch it for a while, it should be spinning with the pulley - this means the compressor is engaged. If not, the compressor is not engaged. If your ac is blowing hot air, then the compressor should be engaged and running (trying to cool). If it is not engaged, then your compressor clutch is probably going out. Could be low voltage to clutch, but more likely the clutch is worn out and only working some of the time. Note: if working normally, the compressor clutch will engage and disengage in cycles- but the air should always be cold. If clutch is bad, compressor would need to be replaced (sold as one unit). This is tricky to diagnose and could take some time - you need to do it when ac is blowing hot air but set to max cooling.

2. Low on refrigerant or refrigerant has moisture in it? If your ac blows cold initially after being off for a while, then heats up, and continues to regularly cycle back and forth between hot and cool air, then the system may be low on refrigerant or the refrigerant may have moisture in it that is freezing and restricting refrigerant flow. An a/c shop can check refrigerant level and even replace refrigerant if moisture is suspected.

Could be other issues, but I would start with these.

Good luck

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I would check your thermostat. Even replace it if its not that expensive. Hopefully its not a heater core. Good Luck..
Have a tech check it out...

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