Question about 2005 Dodge Durango SXT

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NO POWER COMING TO CONDENSER FAN

NEW FAN HAS BEEN ADDED AND STILL NO POWER COMING TO FAN

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There are cooling fan relays. Also check fuses.

Posted on Apr 22, 2014

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1 Answer

On my 2006 ac works good when engine is cool, in stop & go traffic it blows hot air & head pressure gets high in ac, car temp is ok what's wrong


How do you know head pressure is high? Do you have an auxiliary electric cooling fan that is not coming on in this situation? It should be in front of the AC condensing coil. There may be a switch tied to the system that is bad. This switch is sometimes activated by the pressure in the high-pressure line to the condenser coil. If there is not enough freon (134a) the pressure will not be high enough to activate the cooling fan switch. I recently added one can to my system and it made the fan run whereas it did not before adding the freon.

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Radiator fan relay control circuit 2002 dodge ram


low charge pressure of 134A Coolant will not let the fan or compressor clutch engage.

Apr 01, 2014 | Dodge Ram 1500 Cars & Trucks

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Condenser fan not engaging when A/C turned on. All fuses and relays look fine. Tested fan with eternal power and it runs.


Possibly low on refrigerant. When system is low on freon, it does not build up enough high side pressure to engage the condenser fan . When pressure is high enough. a high side pressure switch kicks on the cond. fan to maintain high side pressure. Have the system evacuated and recharged to proper level. A system dye can be added to check for any possible leaks.

Feb 01, 2014 | 2004 Isuzu Rodeo

1 Answer

Air conditioning not too cold ??


Hello,
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Let me explain in layman's terms how the air conditioning (AC) system works and what could be happening to your car.

Like your body, the air conditioning compressor is the heart of the AC system, and Freon is the blood. The compressor pumps Freon throughout the AC system, either the older type R12 which costs as much as gold it seems these days, or the new environmentally-friendly R134A Freon. This Freon is a gas and liquid combination that is compressed and circulated throughout the air conditioning system. The compressed Freon is pushed through the system under pressure and is passed through different sized metal and rubber hoses and a special valve called an expansion valve that cause the gas to expand and contract.

This expansion and contraction makes the Freon gas very cold. This cold gas makes its way via metal lines into the dash area of your vehicle to the evaporator core. This evaporator core is like a small radiator, except it has cold Freon circulating inside and not hot antifreeze. A small fan (the AC blower fan which you control from the control panel on the dash) sits in front of the evaporator core and blows air across this cold evaporator and then through the vents inside your vehicle.

The other objective of the air conditioning system is to remove the heat from inside the cab of the vehicle. This heat is removed by the Freon with the help of the AC condenser located at the front of the car (usually in front of the radiator). The Freon coming back from the evaporator carries the heat from the cab to the condenser via rubber and metal hoses. Just like your radiator, the condenser is lightweight aluminum with many internal winding coils.
The Freon travels through these coils, and in between these coils are small slits or fins that the Freon is forced through. The condenser will have an electric cooling fan mounted in front or behind it to push or pull air through these fins to remove the heat from the Freon. Some vehicles still use the old fashioned fan blade driven by the engine to pull air across the radiator and the condenser.
Now I know that is just a tidbit of information on how the air conditioning system works, and it is very general, but I wanted you to know what to look for to give you insight as to what might be happening with your vehicle.
A few causes of low cooling efficiency or no cooling at all at idle are:

Lack of air flow across the condenser. Make sure the electric cooling fan motor near the condenser is coming on, or in models that are equipped with a fan blade make sure this fan is turning and is turning very fast.

Low Freon levels. Freon level and pressure should be checked by your certified air conditioning mechanic.

Overheating. If the engine is running hot or overheating, it can have a noticeable negative affect on the air conditioning system. Some cars have two electric cooling fans, one for the air conditioning condenser and the other for the radiator. Make sure they are both working properly. Usually at idle on a hot day with the AC on both fans will be on.

When the vehicle is traveling at freeway speeds, the compressor is pumping the Freon throughout the system much faster and harder than at idle. There is a dramatic increase in air flow across the condenser due to 55 mph winds, and the engine is usually operating at a cooler, more efficient temperature as well, thus allowing the air conditioning system to operate efficiently.
Note: An air conditioning system that is somewhat low on Freon can still feel comfortable at freeway speeds due to the added air flow across the condenser which can overcome the ill effects of slightly low Freon. Periodic air conditioning performance checks by your mechanic are the best way to keep the system in great shape.

Hope this helps.

Goodluck

Oct 08, 2010 | 1998 Cadillac DeVille

2 Answers

While running the air conditioning, the air cools and then warms and eventually cools for a little bit again. I think the water pump is what's needed here? what is the big bolt behind the fan?


It is unlikely that the water pump is causing the trouble you describe. The large hex behind the fan is what you would turn to remove the fan clutch from the water pump shaft. This fan clutch is supposed to detect heated air coming through the AC condenser and radiator and engage the fan more positively with the water pump shaft when more air needs to me moved to cool the radiator and AC condenser. The fan clutch could be bad or the AC system may not be properly charged--either of these conditions could cause the problem you describe.

Feb 25, 2010 | 2005 Dodge Ram 1500

1 Answer

The cooling fan on the driver side of the radiator does not work i just put a new one where the water hose side is and now it runs but the other one does not. I put one new thermostat and one new fan...


One of the fans is for your radiator and the other is your condenser fan (for your air conditioning). The condenser fan starts at a higher temp than your radiator fan.
To test the condenser fan (the one on the right side, facing the car) unplug the electrical connector at the motor and use jumper wires to connect the fan directly to the battery. If it runs, check the fuses (engine compartment far upper left as you face the car), then the relay (right front corner of the engine compartment as you face it). The radiator fan typically engages between 189 and 199 degrees, but the condenser fan typically engages between 217 and 232 degrees. In other words they don't necessarily run at the same time. First of all, try letting the car run until the engine is warm WITH the ac running. If the condenser far does not run, then go through the checking procedure.
I hope this gets you started on a fix.

Oct 22, 2009 | 1995 Honda Accord

1 Answer

I have a 2002 Ford Mustang. My air conditioner is not working properly. It blows into the defrost when I take off and when I let off and go a steady speed it blows out cold. It blows hot air sitting at...


if it never comes out face vents then u have a door actuator motor not working ,,if it jumps around letting off throttle then it is a vacuum problem vacuum under hood going into the firewall needs to be checked,,and vacuum resovoir might have hole in it if it is vacuum cantrol,,,the reason for warm and cald temp changes is probley not enough air flow threw radiator and condenser this will rise the high side and low side heating up the freon and it cant cool the freon down enogh to get col air ,electic fan not coming on would cause this or fan clutch (if it has one ) would also cause this .look for fan relay not working ,also did u change accumilator and dryer? ,also may have blockage in condenser i hope i shed some light on the problem

Jun 30, 2009 | 2002 Ford Expedition

2 Answers

Only getting lukewarm air from heater even with new thermostat


1. maybe your ac condenser blower is not working properly
2. slipping ac belt
3. air con compressor hub is sliding due to oil leak

Dec 10, 2008 | 1994 Subaru Legacy Outdoor

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