Question about 2002 Dodge Ram 3500 Truck

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A/c does not blow cold air

I have a 2003 dodge 3500 4x4 5.9 diesel the a/c stoped blowing cold air, the clutch does not engage, i have checked the fuses and no luck

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Ac needs recharged possible leak

Posted on May 21, 2009

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I got a 2003 f150 that just blow hot air when i turn the ac


First thing is to check and see if there is a belt in tact on your compressor and then see whether or not the compressor clutch engages (clutch is on front of compressor in front of belt.) If so and no cold air, u may need to charge it with 134a refrigerant or have a leak that you'll probably want a shop to repair. Good luck and hope you stay cool.

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2003 Ford Excursion 6.0L diesel. A/c blows warm air, compressor was recently replaced and serpentine belt, AC was recharged, condenser, orafice tube. Fuses were checked and it still blows warm. I put it...


Check that the heater is turning off as the hot air will over come the cool air. Check that the clutch on the a/c pulley is still engaging as it the unit was over filled or has a leak from a badly fitted pipe the high low switch will not allow the compressor to work.. If the work was done professionally check that the correct gas was used and seek warranty for the problem.

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04 dodge durango will not blow cold air blows regular air. Why?


Not in a specific order of importance:

A lack of refridgerant.
The compressor not engaging due to low pressure, or another fault.
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Good luck !

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1 Answer

2007 dodge 5.9 l diesel AC blow hot air we have recharged the system but still no cold air any ideas


does the compressor clutch energize? this can be determined by listening in the engine compartment for the clutch to engage. there will be a clicking sound along with the engine adjusting rpm's for the added load of the compressor. check fuses and relays. if it is not engaging. the low pressure switch also may be faulty. it tells the compressor to turn on when pressure drops. which is normal. you can test it by using a paper clip to jumper the two terminals in the connector. it is located on the same a/c line as the low pressure fill port, between the evaporator, which is in the passenger compartment, and the compressor. if the fuses and relays are good, and the compressor doesn't cycle when the switch is jumped, change the low pressure switch. fuses and relays can be found in the owners manual. if you haven't got one, download one at dodge.com.

here's more info:

http://www.aa1car.com/air_conditioning.htm

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You either have a bad refrigerant pressure sensor or a low refrigerant level.

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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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check cooling fan operation while ac on.If fan is working proper,will probably have stuck exspantion valve.

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poss causes are, sticking low pressure switch, defective Ac compressor clutch closing coil or incorrect clutch driven plate air gap, spec is 0.26 thousands.

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Sounds to me like you are low on freon/R22. Get that recharged and that will probably solve your problem.

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