Solved: ac fix

Showing posts with label ac fix. Show all posts

Tuesday, July 3, 2012

Air conditioner blows air but not cold air

A/C is not blowing cold air, but seems to be running .

When the Air conditioner is turned ON,the Air starts blowing out.It blows the air of same temperature as outside air.
Problem noticed on 2000 Dodge Caravan SXT model.

WHAT ARE POSSIBILITIES THAT CAN CAUSE THIS PROBLEM?

AC blowing just a few degrees cooler than the air.This problem can be caused by

Faulty Compressor.
Faulty Expansion Valve.
Low refrigerant.

HOW TO TEST IF COMPRESSOR IS GETTING ENGAGED OR NOT?

Locate the compressor and view the pulley. On the front of the compressor is a pulley driven by the belt, in front of the pulley is the clutch. If the compressor is engaging then the clutch will be spinning along with the pulley.

OK,BUT WHERE IS COMPRESSOR LOCATED ON DODGE CARAVAN?

On 2000 Dodge Caravan A/C compressor is mounted on the front of the engine and has two large aluminum/rubber lines coming out of it.

HOW TO KNOW IF SYSTEM IS LOW ON CHARGE?

To know if refrigerant is low,the A/C pressure test tool is required.Or you can Check the A/C lines.The Aluminium lines coming from compressor.

WHERE ARE THIS ALUMINIUM LINES?

See the diagram shown below,the yellow arrow is pointing towards it.

Here is a picture showing the a/c line coming out of the compressor.

Touch and feel the cooling line.Is it warm or cool.

WHICH LINE SHOULD BE COOL AND WHICH SHOULD BE HOT?

You should have one line coming from the compressor that is hot and one pointing in diagram that should be very cold. If you don't have one that's cold then by far the most likely cause for this would be low system charge.

HOW TO TEST THE LOW SYSTEM CHARGE?

The first thing that will need to be done is check the system charge, either with a manifold gauge set or preferred, with a recovery machine. Most likely your charge is low because of a slow refrigerant leak, or it could be low just because of natural losses. R134a molecules are small enough that they naturally escape through the rubber over time.And its natural.By time the refrigerant gets released in very slow process and refrigerant needs to be recharged.

BUT WHAT IF REFRIGERANT CHARGE IS CHECKED OK?

If the refrigerant charge is checked ok,or even after you get the refrigerant charged the problem is same as before then,its issue with compressor or expansion valve.

BUT HOW WILL I KNOW WHAT IS FAULTY OUT OF THAT?

If charge is ok then the problem could be the compressor or expansion valve.These can be determined by looking at the system pressures.

If pressure is very high on the high side and very low on the low side then you have a restriction, most likely a bad expansion valve.
If the high side is low and the low side is high, somewhat equal pressures, then the compressor isn't working.

This details will help.

Thanks.

Users Who Viewed This Problem Also Viewed:

How to Recharge Car's Air Conditioner

http://repairhelpcenter.blogspot.com/2011/10/how-to-recharge-cars-air-conditioner.html

Car AC Not Blowing Cold Enough?

http://howtobyme.blogspot.com/2011/12/car-ac-not-blowing-cold-enough.html

Car A/C leaking water on floor?

http://howtobyme.blogspot.com/2011/12/car-ac-leaking-water-on-floor.html

Car AC compressor Clutch disengages after few minutes and car bogs down when clutch is engaged?

http://howtobyme.blogspot.com/2011/12/car-ac-compressor-clutch-disengages.html

For All types of Car models and brands help
Go to Newly Launched

FREE Car repair guide?
http://technoanswers.blogspot.in/2012/03/car-repair-guide.html

&
Complete Car repair Help FREE?

http://repairhelpcenter.blogspot.in/2012/03/complete-car-repair-help.html

Wednesday, May 30, 2012

1992 Chrysler Jeep Cherokee: A/C System Pressure is Same on Both High and Low?

In this condition the A.C cooling problem will be noticed.

The 1992 year Chrysler Jeep came with R12 from the factory.if Your jeep is using R134A, then it was converted.

It wasnt until late 1994-early 1995 that R134a became available.

the system calls for 38 ounces, but with R134A conversion, less is installed due to molecule differences in the refrigerant. The industry rule of thumb is 80% of called for. So for yours that will be 30ounces.

Ok, pressure should be 28-35psi on low side and 175-220psi on high side. If it were a restriction in the expansion valve, pressure would be high on the low side, but near normal on the high side.

Yours is neither sucking on the low side, nor pumping on the high side, hence the high low side pressure, and low high side pressure.

If you are positive of the system being at the correct level and compressor engaging, then only one thing causes this - weak compressor. It needs to be replaced.

So the compressor needs to be inspected and tested before getting replaced.

As per description it says compressor is faulty.

This will help.
Thanks.

For All types of Car models and brands help
Go to Newly Launched

FREE Car repair guide?
http://technoanswers.blogspot.in/2012/03/car-repair-guide.html

&
Complete Car repair Help FREE?

http://repairhelpcenter.blogspot.in/2012/03/complete-car-repair-help.html

Tuesday, May 29, 2012

1997 Buick Lesabre: A/C stopped Blowing cold?

On Buick Lesabre 1997 Year model Vehicle it has Automatic Temperature controls with separate Controls for driver's and passenger side temperature adjustment.

In this case first the A/C stopped blowing cold at passenger side and then stopped blowing at driver side.

Ok, the automatic climate control does not have vacuum controls. The blend doors are electronically controlled by the climate control unit and actuators at the blend doors.

Hence one side stopped working and then the other, this majorly indicates that the climate control module failing rather than both the driver and passenger side blend door.

If the shop doing the work does not have a scan tool that can test the climate control unit and the temperature blend door actuators, you will need to have another shop test it or have a dealer test the system.

This needs to be done before spending money on replacing the doors when it is unlikely that both have failed at once.

This details will help.
Thanks.

For All types of Car models and brands help
Go to Newly Launched

FREE Car repair guide?
http://technoanswers.blogspot.in/2012/03/car-repair-guide.html

&
Complete Car repair Help FREE?

http://repairhelpcenter.blogspot.in/2012/03/complete-car-repair-help.html

Saturday, November 26, 2011

How to Operate Car AC ?

Follow this procedure to operate your car AC:----

To cool off your car after it has been parked in the hot sun, drive with the windows open for a few minutes. This vents the hot air, allowing the air conditioning to cool the interior more quickly.

Make sure the air intake grilles in front of the windshield are not blocked (by leaves or snow, for example).

On humid, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

Keep the area under the front seats clear to allow air to circulate throughout the vehicle.

On cold days, set the fan speed to high for a minute to help clear the intake ducts of snow or moisture. This can reduce the amount of fogging on the windows.

When driving on dusty roads, close all windows. If dust thrown up b the vehicle is still drawn into the vehicle after closing the windows, it is recommended that the in intake be set to FRESH and the fan speed to any setting except "OFF".

If following another vehicle on a dusty road, or driving in windy and dusty conditions, it is recommended that the air intake be temporarily set to RECIRCULATE, which will close off the outside passage and prevent outside air and dust from entering the vehicle interior.

HEATING

For best results, set controls to;
Fan speed ---- Any setting except "OFF"
Temperature----Towards WARM (red zone)
Air intake ---- FRESH (outside air)
Air flow ---- FLOOR
Air conditioning ---- OFF

For quick heating, select recirculated air for a few minutes. To keep the windows from fogging, select fresh after the vehicle has been warmed.

Press the "A/C" button on for dehumidified heating.

Choose floor/windshield air flow to heat the voltage interior while defrosting or defogging the windshield.

AIR CONDITIONING

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

For quick cooling, move the air intake selector to recirculate for a few minutes.

VENTILATION

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

DEFOGGING

The inside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone) to heat; COLD (blue zone) to cool
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- ON

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

On humid days, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

DEFROSTING

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

To heat the vehicle interior while defrosting the windshield, choose floor/windshield air flow.
----------
This details will help.
Thanks.
--------------

For car AC related and Heater related solutions. You can refer the options mentioned below:---

Car AC Blows Warm Air ?

http://technoanswers.blogspot.com/2011/10/car-ac-blows-warm-air.html

How to test AUTO AC pressure?

http://howtobyme.blogspot.com/2011/10/how-to-test-auto-ac-pressure.html

AUTO Air Conditioning Troubleshooting?

http://technoanswers.blogspot.com/2011/10/auto-air-conditioning-troubleshooting.html

AUTO A/C COOLING PROBLEM?

http://technoanswers.blogspot.com/2011/10/auto-ac-cooling-problem.html

Fixing refrigerant leak?

http://howtobyme.blogspot.com/2011/10/how-to-fix-refrigerant-leak.html

How to locate Car AC Refrigerant leak?

http://technoanswers.blogspot.com/2011/10/how-to-locate-car-ac-refrigerant-leak.html

CAR AC INTERMITTENT COOLING?

http://technoanswers.blogspot.com/2011/10/car-ac-intermittent-cooling.html

What causes INTERMITTENT COOLING on Car AC system?

http://technoanswers.blogspot.com/2011/10/what-causes-intermittent-cooling-on-car.html

Car AC making Noise?

http://technoanswers.blogspot.com/2011/10/car-ac-making-noise.html

BAD ODOR ON CAR AIR CONDITIONER?

http://technoanswers.blogspot.com/2011/10/bad-odor-on-car-air-conditioner.html

How to Recharge Car's Air Conditioner

http://repairhelpcenter.blogspot.com/2011/10/how-to-recharge-cars-air-conditioner.html

For details regarding:--

How does Vehicles Engine cooling system works?

http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html

Engine cooling components working?

http://repairhelpcenter.blogspot.com/2011/11/engine-cooling-components-working.html

How to flush cars radiator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-flush-cars-radiator.html

Friday, November 25, 2011

How to Replace Vehicles Accumulator/Receiver Dryer ?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

Its advisable to first inspect the Accumulator/dryer then confirm the problem,then replace it.

For more details regarding Inspecting Accumulator/Receiver Dryer ,Click the link below:--

How to Inspect Vehicles Accumulator/Receiver Dryer?

http://repairhelpcenter.blogspot.com/2011/11/how-to-inspect-vehicles.html

For more details regarding Replacing Accumulator/Receiver Dryer read as follows :---

WARNING

Do not uncap the drier or accumulator until the unit is ready for installation. Remember: the desiccant attracts moisture from the surrounding air.

WARNING

Only EPA-certified technicians can purchase R-12 refrigerant, since proper recovery and recycling techniques are required to prevent damaging the environment. Improper disposal of R-12 refrigerant can result in a fine.

The receiver drier is usually located under the hood of the car. The drier should be placed where it can be kept as cool as possible. At least one independent manufacturer of aftermarket systems mounts the drier inside the evaporator case where it is always surrounded by the cool air of the evaporator.

The inlet and outlet fittings of receiver driers may be 3/8-inch SAE flare, 5/16-inch barb, O-ring, or block type. Also, receiver driers may have specially formed inlet and outlet tubing before the fitting provisions. As a rule of thumb, it is recommended to replace a receiver drier with an exact duplicate. This is particularly important to ensure refrigerant capability with the desiccant.

Manufacturers' recommendations should be followed when mounting a drier. For proper operation, the vertical-type drier must be mounted so that it does not incline more than 15°. The inlet of the drier must be connected to the condenser outlet and the outlet of the drier to the evaporator metering inlet.

The word IN is generally stamped on the inlet side of the drier. If the inlet is not stamped, an arrow indicating the direction of refrigerant flow should be visible. Remember that the refrigerant flows from the condenser bottom toward the metering device inlet. If the drier is connected in reverse, insufficient cooling will result.

As a result of improper handling or shipping, the internal parts of the drier may become dislodged and cause a partial restriction within the drier. This condition is indicated by a marked temperature change between the inlet and the outlet of the tank. If the restriction is great enough, frosting occurs at the drier outlet.

If the pickup tube is broken because of rough handling, abnormal flashing of the gas occurs in the liquid line. This is the same indication that is evident due to a low charge of refrigerant. In either case, a new drier must be installed.

Screens are located in the inlet of the metering device, the inlet of the compressor, and in the receiver drier. The screen in the thermostatic expansion valve and compressor can be cleaned or replaced. If the screen in the fixed orifice tube or drier becomes clogged, the entire component must be replaced.

-----------

This details will help.

-------------

Also if you have better understanding of other car AC cooling system parts,then it will help more to troubleshoot the problem.

Check the list below or more help.

Its always advisable to know the AC components working and testing procedure,before replacing any part.

For more details regarding cars AC components.Check out the list of links below:---

How to Perform Car AC Leak detection Test?

http://repairhelpcenter.blogspot.com/2011/11/how-to-perform-car-ac-leak-detection.html

How to Perform AC Pressure Test?

http://repairhelpcenter.blogspot.com/2011/11/how-to-perform-ac-pressure-test.html

How to test Cars AC System?

http://repairhelpcenter.blogspot.com/2011/11/how-to-test-cars-ac-system.html

How to inspect Vehicles A/C Compressor and Clutch?

http://repairhelpcenter.blogspot.com/2011/11/how-to-inspect-vehicles-ac-compressor.html

How to Troubleshoot Vehicles AC Cooling Problem?

http://repairhelpcenter.blogspot.com/2011/11/how-to-troubleshoot-vehicles-ac-cooling.html

How to Replace Vehicles A/C Compressor and Clutch Components?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-vehicles-ac-compressor.html

How to inspect Vehicles A/C Condenser?

http://repairhelpcenter.blogspot.com/2011/11/how-to-inspect-vehicles-ac-condenser.html

How to Service Car AC Condenser?

http://repairhelpcenter.blogspot.com/2011/11/how-to-service-car-ac-condenser.html

How to Replace Auto AC Condenser?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-auto-ac-condenser.html

How to Replace Vehicles A/C Evaporator Core?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-vehicles-ac-evaporator.html

-----------

For car AC related and Heater related solutions. You can refer the options mentioned below:---

Car AC Blows Warm Air ?

http://technoanswers.blogspot.com/2011/10/car-ac-blows-warm-air.html

How to test AUTO AC pressure?

http://howtobyme.blogspot.com/2011/10/how-to-test-auto-ac-pressure.html

AUTO Air Conditioning Troubleshooting?

http://technoanswers.blogspot.com/2011/10/auto-air-conditioning-troubleshooting.html

AUTO A/C COOLING PROBLEM?

http://technoanswers.blogspot.com/2011/10/auto-ac-cooling-problem.html

Fixing refrigerant leak?

http://howtobyme.blogspot.com/2011/10/how-to-fix-refrigerant-leak.html

How to locate Car AC Refrigerant leak?

http://technoanswers.blogspot.com/2011/10/how-to-locate-car-ac-refrigerant-leak.html

CAR AC INTERMITTENT COOLING?

http://technoanswers.blogspot.com/2011/10/car-ac-intermittent-cooling.html

What causes INTERMITTENT COOLING on Car AC system?

http://technoanswers.blogspot.com/2011/10/what-causes-intermittent-cooling-on-car.html

Car AC making Noise?

http://technoanswers.blogspot.com/2011/10/car-ac-making-noise.html

BAD ODOR ON CAR AIR CONDITIONER?

http://technoanswers.blogspot.com/2011/10/bad-odor-on-car-air-conditioner.html

How to Recharge Car's Air Conditioner

http://repairhelpcenter.blogspot.com/2011/10/how-to-recharge-cars-air-conditioner.html

For details regarding:--

How does Vehicles Engine cooling system works?

http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html

Engine cooling components working?

http://repairhelpcenter.blogspot.com/2011/11/engine-cooling-components-working.html

How to flush cars radiator?

http://repairhelpcenter.blogspot.com/2011/11/how-to-flush-cars-radiator.html

How to Inspect Vehicles Accumulator/Receiver Dryer ?

First read and know what is Accumulator and what is its working operation:----

A tank located in the outlet of the evaporator to receive refrigerant that leaves the evaporator. A component used to store or hold liquid refrigerant in an air-conditioning system. This device is constructed to ensure that no liquid refrigerant enters the compressor.
A device that cushions the motion of a clutch and servo action in an automatic transmission.
A register or storage location that forms the result of an arithmetic or logic operation. Commonly used when a series of calculations are to be used.

This is how Accumulator looks:---

Now Go through this Inspecting procedure:----

Air conditioners use either a receiver dryer or an accumulator. These devices vary slightly as to function and differ as to where they are installed in the system:

A receiver dryer is installed in the high side.
An accumulator is installed in the low side.

A receiver dryer fills and siphons liquid refrigerant from the bottom.

An accumulator separates vapor and liquid. It pulls off vapor from the top. Courtesy of Ford Motor Company.

Some systems have a sight glass on the receiver dryer or in the high pressure liquid line so that unwanted vapor bubbles can be spotted as the system operates. This can give a quick check of whether the refrigerant level is too low. A sight glass is only found on the high pressure side of the system. Also, look for signs of leakage. If you find leaks, replace the part.

An accumulator cannot be serviced. Inspect it to see if it is defective or wet, if so, the entire unit must be replaced. Also check the expansion tube that serves as a metering device to the evaporator. If the expansion tube is clogged, it is again necessary to replace the accumulator.

If you think your accumulator or receiver dryer is defective, you'll need to perform an a/c system test.

---------------

This details will help.

-------------

Also if you have better understanding of other car AC cooling system parts,then it will help more to troubleshoot the problem.

Check the list below or more help.

Its always advisable to know the AC components working and testing procedure,before replacing any part.

For more details regarding cars AC components.Check out the list of links below:---