Solved: ac problems

Showing posts with label ac problems. Show all posts

Tuesday, May 29, 2012

2005 Volvo S80: Necessary to Replace Receiver/Drier For A/c?

When the Vehicle A/C system is disassembled or open or taken Apart.
Its mostly necessary to replace the Receiver/ Drier part.

Yes, the receiver/drier contains what is called a deccisant bag, which is designed to absorb moisture in the system. When you open up the system to replace any parts, the deccisant bag fills with moisture from the atmosphere and its effectiveness is greatly reduced.

You can decline to have it replaced, but if you do so then there will be no warranty on the job of getting the proper cooling from A/C system, as you have declined required work. The system likely will not get as cold either since the receiver drier can no longer pull the moisture out of the system.

So getting this component replaced.If the A/C Repair center is recommending it.

This details will help.
Thanks.

For All types of Car models and brands help
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2006 Volvo S40: A/C Runs Intermittently?

Air conditioner is running sometimes for a while then just stops.
In this cases you will notice that A/c stops working but fan just keeps on running.

In this types of problem there is no one single possibility.There are multiple possibilities that can cause this problem.

First thing you have to inspect is compressor.Is the compressor engaging or not engaging when A/c stops running.

there are many possible causes:

-low refrigerant
-faulty compressor
-faulty compressor clutch coil
-faulty pressure switch
-short/open in wiring harness
-internal fault in climate control panel
-fault in ecm
-restriction in the condensor
-restriction in the expansion valve

Unfortunately, as you can see, there is no one single cause. The first step is to read the high and low pressure readings with an ac manifold gage on a test drive to see what the readings are when it quit blowing cold air.

This will let you know or confirm if there is any restriction in either the condensor or expansion valve, if refrigerant is low, or if the compressor disengages.

If compressor disengages, then electrical testing has to be performed to see why and where the signal is lost.

I really wish I could tell you that it is one single thing and you just need to replace "X part", but that is not the case as professional testing is really required for this in order to find the underlying cause out of the several possible causes.

This detail 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

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Complete Car repair Help FREE?

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

2000 Chevy Corvette: Vehicle runs hot when A/C is ON?

Engine gets overheated hot in traffic when A/c is turned on.

But in Normal open road it works fine.

In this types of cases the thermostat and cooling fan needs to be monitored.

There are two engine cooling fans on Chevy corvette 2000 year model vehicle.

So first you do need to verify that both fans are properly working. For that you may need to use a flashlight to see it spinning. If it isnt, then the basics of checking for power to the motor, and if no power, then checking the cooling fan relays and fuse(both labeled) in the engine compartment fuse box.

If no power at the fuses, then engine coolant temperature sensor and ac pressure switches will need to be tested and finally, if needed, the pcm tested.

If the fan is working, then first check for any missing, cracked or broken fan shroud that is allowing for inefficient fan cooling.

If ok, then both ect sensor and ac pressure switch and pcm will need to be monitored with a scan tool to see if the fans are coming on at proper temperature and ac pressure and then fan monitored to see that it is spinning at proper speeds.

I know that sounds like a lot, but with symptoms described, this is in the fan operation in some capacity and will require going thru the above steps to find the underlying cause and then repair.

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.
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This details will help.
Thanks.
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For car AC related and Heater related solutions. You can refer the options mentioned below:---

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

Thursday, November 24, 2011

How to test Cars AC System?

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.

Car AC system Testing is as follows :----

WARNING

Never expose A/C refrigerant to open flame. A poisonous gas, phosgene or mustard gas, will result.

A/C Sytem Test

Testing Air Conditioning Efficiency

Before temperature and pressure tests, the following list of items should be met:

Set the temperature control to maximum cool and normal AC. Some manufacturers call for MAX AC so that recirculating air is used. Be sure to check the specifications.
Set the blower position to high.
The temperature inside of the car must be stabilized (not getting cooler).
Engine speed must be at least 1500 rpm to ensure adequate refrigerant flow.
The compressor clutch must be engaged.

Air Discharge Temperatures

This chart below shows a chart of expected air discharge temperatures at different outside temperatures. The vertical temperature readings refer to actual duct readings. The horizontal readings refer to the day's outside temperature.

A chart showing expected air discharge temperatures at different outside temperatures. Courtesy of Ford Motor Company.

The drop in the air's temperature as it passes through the evaporator should be at least 20°F. It is very difficult to tell how well A/C works on a cool day.

Rules of thumb:

With 70°F air entering the evaporator, expect about a 20°F drop in air temperature (50°F).
With 80°F air entering the evaporator, expect about a 25°F drop in air temperature (55°F).
With 90°F air entering the evaporator, expect about a 30°F drop in air temperature (60°F).

It is important that the hood be closed during this test.

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There are tests like :---

AC pressure test.

Leak detection test.

To know more about this test and perform this test yourself.Check the link details shown below:----