Question about 2004 Kia Sorento

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My air conditioner compressor comes on when i turn the dial to windshield/floor and goes off when i switch it to floor.

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Do you mean the defrost position? Cause if so, that's what it should do. It's designed to come on for defrost to take the moisture off the glass in that setting and when you turn it to the floor setting, it turn's off unless you push the a/c on/off button to command it back on.

Posted on May 30, 2010

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How do i keep the air conditioner from coming on


Well, you have PART of the facts. The whole truth is that the air conditioning does NOT come on if you have the heat turned on and you are using any mode OTHER than DEFROST or A/C. You may not realize it, but you WANT the air to come on when you are using the defrost mode. The reason for this is because the cold coils of the A/C evaporator causes moisture in the air to condense and the moisture then is able to collect and run out the drain tube at the bottom of the A/C housing which empties outside the car. So the air goes through the A/C coils first to be dried, then through the heater core to be heated.

Without this feature in wet weather conditions, the heater would simply heat the moisture and blow it onto your windshield and into the rest of the vehicle. This will cause your windshield to fog up WORSE than if you did not use the defrosters. This will also cause your side and rear windows to fog up as well. You have probably noticed the side windows fogging also when you are using the floor heat. Have you noticed that when you put the mode selector in the defrost position to clear the windshield, that the side and rear windows will also clear? This is because the A/C is DRYING the air inside the car.

Another part that you are probably not aware of is that if the outside air temperature is below 35 Deg. F the air conditioner compressor will not run at all - no matter WHAT mode you have it in. It won't even run in the A/C mode. This is for two reasons:
1. It protects your A/C system from operating at too low of a temperature which can cause freezing of the A/C components and damage to the system.
2. If the outside air is already cool, there will not be much moisure in it to begin with and whatever moisture there is will still condense on the A/C evaporator coils as it passes through it simply because it is cold.

You may be experiencing the A/C clutch cycling on and off in the cooler weather with the defrost on. This is NORMAL. However, if it is causing the engine to surge dramatically when it cycles, then the problem is NOT that the A/C is causing undue stress on the engine, but rather that the Idle Air Control valve (IAC) is not reacting to this change like it should. The IAC is supposed to raise the engine RPM a slight amount just as the compressor engages to lessen the affects of the extra load that is placed on the engine. Some "surging feeling" cannot be avoided, however, if it is severe, then it needs to be checked out.

Nov 17, 2011 | 2000 Ford Taurus

3 Answers

Water on floor passenger side after it rains and after air has been running 2000 grand prix


Ac hose leak?
leaking heater core?

Hint: it leaks when it RAINS

If it were related to the heater core or the AC drain, it would be leaking when it is not raining also, so those diagnoses are not logical.

The grand prix has a long history of floor leaks from seal failures around the air intake under the windshield cowling, where RAIN water runs in.

May 04, 2011 | 2000 Pontiac Grand Prix

2 Answers

The air conditioning in my 2005 T&C stopped working. Right before it stopped there was a "burnt" smell coming through the vents. What happened?


No air coming from air conditioning vents
  1. Check the air conditioner fuse and replace as necessary.
  2. Air conditioner system discharged. Have the system evacuated, charged and leak tested by an MVAC certified technician, utilizing approved recovery/recycling equipment. Repair as necessary.
  3. Air conditioner low pressure switch defective. Replace switch.
  4. Air conditioner fan resistor pack defective. Replace resistor pack.
  5. Loose connection, broken wiring or defective air conditioner relay in air conditioning electrical circuit. Repair wiring or replace relay as necessary. Air conditioner has a smell when used
    1. The air conditioner evaporator drain hose is blocked or partially restricted, allowing condensation to build up around the evaporator and drainage tray. Clear the drain hose where it exits the passenger compartment.
    2. Check compressor clutch wiring, electrical connections and compressor clutch, and repair or replace as necessary.

Oct 10, 2010 | 2005 Chrysler Town & Country

1 Answer

I have an 01 Jeep Grand Cherokee. When you turn on the air conditioning air does not blow out any of the vents except a small amount of air (cold) will blow out the defroster vents by the windshield. If...


behind the center counsel between the floor and the heater housing is a part that is called the blend door actuator. these usually go bad and have to be replaced.

Mar 15, 2010 | 2001 Jeep Grand Cherokee

1 Answer

In my 1996 Buick Park Avenue the air conditioner only blows thru the windshield and floor vents. No air comes from the middle vents?


U HAVE WHATS CALLED A BLEND DOOR IT CONTROLS WHICH VENTS THE AIR GOES TO IN SOME CASES MORE THN ONE U NEED TO FIND OUT WHICH CONTROLS THE FRONT DASH

Aug 19, 2009 | Buick Park Avenue Cars & Trucks

1 Answer

Air only blows out on windshield & floor when


THERE IS A VACUUM LINE THAT GOES FROM THE LEFT FRONT OF THE ENGINE TO THE VACUUM CHECK VALVE NEAR THE ACCUMULATOR. IF THAT LINE IS BROKEN THE PROBLEM YOU HAVE IS NO HVAC MODE SWITCHING.

Jul 12, 2009 | 1998 Chevrolet Astro

1 Answer

The compressor and fan don't come on when the air conditioner is turned on and hot air comes through the vents. However, when the relays are removed and a test wire is inserted into the relay port, th


Sounds like a bad heater control unit, or bad control module. You are bypassing the switch when you jump the relays, so usaully the switching mechanism is suspect.

Jun 02, 2009 | 2007 Ford Fusion I4 SEL Sedan

1 Answer

Air conditioner makes noise which increases as you rev the engine and slows as you take foot off the gas.also, the front vents (by the windshield) also noisy when you switch to them,opposed to having the...


YOU SEEM TO HAVE A LOOSE OR BAD AC COMPRESSOR DRIVE BELT. WHEN YOU SWITCH THE TO THE VENTS CLOSE TO THE WINDSHIELD IT TURN THE AC COMPRESSOR CLUTCH ON, IT ACTIVATES THE DEFROST. TRY POURING SOME WATER ON THE AC BELT AND SEE IF NOISE GOES AWAY. THE BELT MAY NEED ADJUSTMENT OR MAY NEED TO BE REPLACED. GOOD LUCK

Dec 10, 2008 | Hyundai Santa Fe Cars & Trucks

1 Answer

AIR CONDITIONER


On most vehicles with front and rear A/C, the two systems are basically independant of each other just sharing the compressor and condensor. It is possible that the Mode Door (controls where the air flow is sent; ie: windshield, vents, floor) is out of adjustment or sticking.

May 20, 2008 | 2004 GMC Savana

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