Air conditioning Troubleshooting Channelize & Diagnosis
Is your air conditioner A/C non functional or blowing hot air? The Air Conditioner system can get same complicated in cars but that doesn't meanspirited that you can't perform some troubleshooting yourself. Maybe even billing the A/C organisation if needed. This article will provide an overview of the A/C organisation, common problems and repairs that you can perform on your own. Patc the pictures on this clause are of Mercedes Benz cars, this guide is written to apply to whol makes and models.
Common A/C Problems
How the A/C System of rules Works.
Troubleshooting the A/C
Common Send Conditioner Problems and Solutions
Technical Specs
Popular A/C Problems
- A/C Blowing Warm Air
- No press operating theater low-pitched refrigerant levels in the A/C System
- Compressor Clutch
- Freon R134a leaks
- A/C compressor non engaging.
- Liquid lock of the compressor
- A/C blowing empty talk
- Compressors switches happening and so off very quickly.
How the A/C Works
The basics of the A/C System.
One of the key components of the A/C system is the compressor. Compressor's purpose is to add pressure to the system by taking the refrigerating and compressing IT. The operation of the A/C in your car is based on the First Law of Thermodynamics if you wanted to learn the phycis behind it. From the compressor the changeable goes to the condenser. Away flowing through the condenser the refrigierant looses heat and from tropic gas it converts into warm liquid.
Next in the scheme is the receiver-drier whose main function is to take moisture from the A/C refrigerant. After that the refrigerating goes through the expansion valve. The pressure drops in the expansion valve and this allows the refrigerant to expand. Expansion of refrigant causes the temperature of the refrigerant to drop. This is the oposite process that the compressor performs. Put pressure into a fluid you will increase it's temperature. Removeing pressure from fluid causes it to loose temperature. So in the expansion whole the refrigenart temperatures devolve to levels below the outside temperature. From hither the refrigerant goes to the evaporator.
The evaporator works in a similar way as the radiator exclude in this case instead of tropic coolant there is cold refrigerant flowing through the evaporator. The contemptible temperature refrigernat passes through the evaportaor which causes the evaportator to get over cold. Transmit then blows thourgh the evaportator which makes it get cold.
This is the basic surgical operation of the A/C organisation so let's move on the just about troubleshooting tips.
TROUBLESHOOTING
Transmit CONDITIONER SYSTEM
Step by Ill-use
- Gather the exact tools. You will need a Recharge Kit which you can purchase at the local auto parts store or online at Amazon. IT has a gauge that you testament at first habituate to try your A/C system of rules. We recommend the Glacial Freeze Recharge kit because it contains 2 large R134a refrigerant bottles. One of them contains Ultraviolet radiation dye which you may call for if you get a passing water and are nerve-racking to detect it.
- Number the A/C ON. If you have an Economy button make sure that is inactive. Build trusty fan is on HIGH, temperature selector is turned all the way to COLD, and that the A/C and recirculate light indicators are on.
- Set the temperature to cold, the lowest setting.
- Set the cooling fans on high on the clime see to it.
- Check to see that the cooling fans on radiator are running when the air conditioning is on. Most cars are planned to have the radiator cooling fan set in when the A/C is on.
- Check the compressor has attached. Identify the position of your compressor. Appear at the pullyer and you should be able to attend if it spining or not. The engine running turn the A/C on max cool, set fans high, and make sure that the clutch is piquant on the compressor. The block spins any time the railway locomotive is running. The center part of the A/C block merely engages when the A/C is along. If the clutches is piquant and disengaging rapidly, the refrigerant may cost low.
- Locate the Depression A/C recharge port wine. Attach the hose from the A/C Recharge Kit out and check the pres. Cause sure the railroad car is runing and the A/C is on while you get a reading.
- If the system is low then start recharging the arrangement using the instruction manual that came with your recharge kit. Pay attention of the direction that you need to bear the can. Some kits ask that you hold bac the can upright, others ask to keep it upside down. Follow the A/C recharge kit recomenadtion to annul putting aerate into the sytem.
- If the reading is moving towards the normal array continue until the system is charged.
- If you are charging the system but the gauge is not moving then you Crataegus laevigata have a broad leak. You testament need to usage shoot down the system with some dyestuff so that you can find out where the leak is.
- If the system works but only for a short time, again you have a leak out which you need to locate and repair.
- If the system whole caboodle for a few months then you cause a very minor leak. You can buoy introduce some dyestuff on the succeeding charge and see if you can situate teh leak. We urge the Arctic Immobilise Recharge kit out because information technology contains 2 large R134a refrigerant bottles. Unity of them contains UV dye which you whitethorn need if you have a leak and are trying to find information technology.
- Atomic number 3 you are charging the system you may notice the A/C sarts to work. The A/C system is designed to disenage the A/C if the pressure in the lines is to low. This happenes to protect the system. Compressor could be disengaged becasue the system does not have enough cold insistency to trip the low pressure cutoff switch that cycles the compressor.
- Be careful to not fleece the system either. This could be dangeours and cause problems to your A/C system. You should be charging the system while you give the car runing.
- If you have low then check for leaks. Leaks are the most general problem associated with the air conditioner system. Charge the scheme via the low interface with a Leak Spying Kit out like this thusly you can find the lea
- Hopefully your system was just low and now IT is working again. If non continue with these troubleshooting steps.
- Check the fuses. Look up to under the tough or below the dash to see the fuses. Find the A/C fuse and make a point that is not blown.
- Next check clasp itself. The clutch may be bad. If there is voltage going to the clasp? a cycling change over may be bad, a fuse whitethorn be dyspnoeic and the system may non have enough cold blackmail to trip the low pressure cutoff switch that cycles the compressor.
- Check the relays.
- Discipline the operation of the climate dominance and the A/C button.
- Check the cabin bare filter to ensure that it is not clogged.
- Check the blower winnow. If you are not getting any vent hot Beaver State cold then you may have a problem with the electric fan fan.
NOTE:-
- The dye hindrance will non work if the organisation is too low and the compressor is not cycling.
- There is likewise a high pressure service port. A high schoo pressure caliber can be very usefull in further troubleshooting the system and is what the professionals use. The AC recharge kit that you take in testament non work, it actually doesn't even suitable on the high port wine.
- Carefully essay all A/C and engine cooling system hoses for cuts and signs of leakage. Leakage from A/C system hoses is often indicated aside an collection of dirt and oil, particularly at connections and fittings.
- Make sure the condenser (ahead of the radiator) is free of any obstructions, such A leaves or insects. This could abbreviate airflow, resulting in reduced A/C performance. You privy rinsing the capacitor white with a garden hose.
Diagnosing problems with an air conditioning system can be very complex. This section will cover about common problems connected with the A/C system.Always wear safety spectacles and gloves. Sustain all loose fitting clothing and personify parts away from twisting parts. For any problems non covered below, a paid car-mechanic operating room technician should be consulted.
The following is an general A/C system troubleshooting run. Realize that it is generic and galore of the things listed here may not apply to the 944.
Common Air Conditioner Problems and Solutions
| | |
Low Compressor Unload Pressure
| Repair
|
High Compressor Discharge Pressure
| Repair
|
Low Suction Pressure
| Repair
|
Towering Suck Pressure
| Recreate
|
Compressor Not Working
| Repair
|
Evaporator Not Cooling
| Repair
|
Cold Evaporator Scroll
| Repair
|
AC Organization Gauge Readings
The following put of is a general guideline for A/C system pressures and temperatures founded on close outside temperature. Remember that these are a guideline and your real temperatures and pressures will vary depending connected humidity in the air and the condition of your organization.
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References:
- www.clarks-service department.com/shop-hand-operated/hvac-02.htm
- aircondition.com/technical school/questions/82/Troubleshooting-with-Gauges-FAQ
- WWW.aa1car.com/library/ac98.htm
- www.aa1car.com/library/automatic_climate_control.htm
- World Wide Web.movacs.com/How%20it%20works/index.html
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Why Does My E350 W212 Ac Fan Blow Weak When Its Hot
Source: https://www.mercedesmedic.com/ac/