The most effective method to Diagnose Your Car's Air Conditioning System


Izarra Automotive - There will never be a decent time for your cooling in your auto to quit working, however it ordinarily appears to occur in the dead warmth of summer. On the off chance that your AC framework has either stopped working or has quit functioning admirably, you're looked with driving your vehicle around with the windows down - which brings little alleviation when it is hot outside. Having some information about how the cooling functions in your vehicle can enable you to get the framework working once more.

Section 1 of 9: Understanding the AC framework and segments 


Your auto's cooling framework works simply like a fridge or your home cooling. The motivation behind the framework is to expel tourist from within your vehicle. It comprises of the accompanying parts:

Segment 1: Compressor. The reason for the blower is to pressurize the cooling framework and flow the refrigerant. It's situated at the front of the motor and is commonly determined by the primary drive belt.

Segment 2: Condenser. The condenser is situated in the front of the radiator and is utilized to expel warm from the refrigerant.

Part 3: Evaporator. The evaporator is situated inside the dash of the vehicle and is utilized to assimilate warm from the inside of the auto.

Segment 4: Metering gadget. This is known as a metering tube or a development valve and can be found either under the dash or in the engine close to the fire divider. Its motivation is to change the weight noticeable all around molding framework from high strain to low weight.

Part 5: Hoses or lines. These comprise of metal and elastic lines to convey the refrigerant.

Part 6: Refrigerant. Ordinarily, all frameworks today contain R-134A refrigerant. This can be bought over the counter at most car parts stores. More established vehicles were worked with R-12, or, in other words utilized in light of the fact that it contained high measures of ozone exhausting mixes. In the event that you have a permit and accreditation you can at present buy this, however a great many people select to retrofit this framework to the more current R-134A refrigerant.

In spite of the fact that these are the essential segments of the cooling framework, your vehicle has a progression of electrical circuits that enable it to work, and a dash framework that contains various entryways that move inside the dash that can influence viability. The following are the most widely recognized reasons for poor cooling execution and what should be possible to get you serenely back out and about.

Section 2 of 9: Tools and wellbeing 


When playing out any cooling framework benefit you should have the best possible instruments - and practice alert when utilizing them.

Reason 1: High weight. The cooling framework is loaded up with high weight refrigerant, and can work at more than 200 psi, which can be exceptionally risky.

Reason 2: High temperature. Parts of the AC framework can achieve well more than 150 degrees Fahrenheit so be extremely cautious when interacting with parts of the framework.

Reason 3: Moving parts. You should keep an eye out for moving parts in the engine while the motor is running. Keep all pieces of attire firmly anchored.
Air conditioning check set


Materials Needed 


  • Cooling complex check set 
  • Gloves 
  • Refrigerant 
  • Security Glasses 
  • Wheel Chocks 
  • Cautioning: Never include anything besides the prescribed refrigerant to the AC framework. 
  • Cautioning: Always wear wellbeing glasses when adjusting any pressurized framework. 
  • Cautioning: Never introduce the checks with the framework running. 


Section 3 of 9: Performance check 

vehicle stopped on a level surface with wheel chocks around the back tire


Stage 1: Park your vehicle on a level surface.

Stage 2: Place the wheel chocks around the driver side back tire.

Stage 3: Open the hood.
cooling blower


Stage 4: Locate the cooling blower.


  • Tip: The blower will be mounted towards the front of the motor and is driven by the motor drive belt. You may require a spotlight to have the capacity to see it. It's one of the bigger pulleys in the framework and has a different grip situated on the front of the blower. It will likewise have two lines associated with it. In the event that you experience difficulty finding it at that point begin your motor and kill the cooling. The blower pulley will turn with the belt, yet you should see that the front of the blower grasp is stationary. 


Stage 5: Turn on the AC. Turn the cooling on in the vehicle and check whether that grip that was beforehand stationary is currently locked in.

Stage 6: Turn the fan to Medium. On the off chance that the blower grasp drew, in kind to within your vehicle and turn the fan speed to Medium.

Stage 7: Check the air temperature. Check whether the temperature of the air originating from the primary dash vents is cool.

Read the parts beneath to comprehend the distinctive conditions that you may see:

  • No air leaving the vents 
  • The blower grasp not locks in 
  • The grasp is connecting however the air not cool 
  • The framework is unfilled on refrigerant 
  • The framework is low on refrigerant 


Section 4 of 9: No air leaves the dash vents 

When playing out your underlying check, if air does not originate from the inside dash vents or if the air is originating from the wrong vents, (for example, the floor or windshield vents) at that point you have an issue with the inside atmosphere control framework.

  • Wind stream issues can be caused by anything from a blower engine issue to an electrical issue or a module disappointment. This would should be analyzed independently. 


Section 5 of 9: The blower grip does not lock in 

The grip may not draw in for a few reasons, the most widely recognized being low refrigerant in the framework, yet it might likewise be an electrical issue.

Reason 1: Voltage. Voltage isn't sent to the grip when the cooling is turned on because of an open circuit in the electrical circuit.

Reason 2: Pressure switch. A cooling framework weight switch can disturb the circuit if certain weights are not met or if the switch is falling flat.

Reason 3: Input issue. More up and coming frameworks are PC controlled and utilize various different sources of info including vehicle inside and outside temperature to decide if to turn the blower on.

You have to decide whether there is refrigerant in the framework.

Stage 1: Turn the motor off.
Air conditioning speedy associations

Stage 2: Install the measures. Introduce the measure set by finding the high and low side snappy associations.

  • Tip: The area of these differ on each auto, yet more often than not you will locate the low side on the traveler side of the motor compartment and the high side towards the front. The span of the fittings are extraordinary so you won't have the capacity to introduce the measure set in reverse. 


Stage 3: Observe the weight readings on the checks. 


  • Cautioning: Do not check for weight by pushing on the fitting to check whether refrigerant turns out. This is unsafe and it is unlawful to vent refrigerant into the climate. 
  • In the event that the perusing is zero you have a noteworthy hole. 
  • In the event that there is weight however the perusing is underneath 50 psi then the framework is low and may simply should be energized. 
  • In the event that the perusing is over 50 psi and the blower isn't connecting then there is either an issue with the blower or you have an electrical framework disappointment that should be analyzed. 


Section 6 of 9: The grasp connects however the air isn't cool 

Stage 1: Turn the motor off and introduce the measure set. 

Stage 2: Restart the motor and turn broadcasting live molding. 

Stage 3: Observe the weight readings. 


  • In spite of the fact that each cooling framework will shift, you need to see the high side weight around 20 psi and the low side around 40 psi. 


  • On the off chance that both the high and the low side are underneath these readings then you may need to include refrigerant. 


  • On the off chance that the readings are high then you may have an issue with air caught in the framework or a wind stream issue with the condenser. 


  • On the off chance that the weights don't change at all when the blower connects then the blower has fizzled or there is an issue with the metering gadget. 


Section 7 of 9: The framework is vacant 

Materials Needed 

  • Refrigerant color 


On the off chance that there was not weight discovered amid your test then the framework is vacant and there is a break.

  • Most cooling framework spills are little and hard to discover. 

cooling color pack with color, glasses, and UV light



  • The best method to find a hole is with refrigerant color. Color units are sold at most automobile parts stores. 
  • Utilizing the maker's directions, infuse the color into the cooling framework. This is typically done through the low weight benefit port. 
  • Enable the color to works its way through the framework. 
  • Utilizing the provided UV light and glasses you will examine the majority of the segments and hoses of the cooling framework and search for any gleaming material. 
  • Most colors are either orange or yellow. 
  • When you discover the break repair it as required. 
  • In the event that the framework was vacant then it should be completely cleared and revived. 


Section 8 of 9: The framework is low 


  • While adding refrigerant to the framework you need to take it moderate as you don't know the amount it quite. 
  • At the point when a shop plays out this obligation, they utilize a machine that pulls the refrigerant from the framework, gauges it, and afterward enables the expert to include the correct measure of refrigerant once again into the framework. 
  • Most locally acquired refrigerant units accompany their very own charging hose and measure that enable you to include refrigerant yourself. 


Stage 1: Turn off the motor. 

Stage 2: Disconnect low side measure. Separate the measure set from the low side port.

  • Tip: You should just charge on the low side to anticipate damage. 


Stage 3: Install charge unit. Introduce the charging pack to the low side association on the AC framework.

Stage 4: Turn on motor. Turn on the motor and the cooling.

Stage 5: Observe. Watch the measure on the pack and start including the refrigerant whether it be with a catch or a trigger on the unit.

Tip: Add the refrigerant in little sums, checking the energize measure between applications.

Stage 6: Reach wanted weight. Quit including when the measure is consistently in the green territory, or, in other words 35-45 psi. Enable the framework to keep running and check the temperature of the air leaving the dash vents ensuring it is cool.

Stage 7: Disconnect the charging hose. 

You have now filled the framework with refrigerant. Ensure that you don't cheat the framework as an excessive amount of refrigerant is similarly as awful - if not more regrettable - than too little.

Section 9 of 9: The cooling still does not work 

On the off chance that the cooling still does not fill in as wanted further testing is required.

Cautioning: You should have an extraordinary permit to legitimately benefit a cooling framework.

This framework can be amazingly mind boggling, and takes various different devices and repair manuals to accurately analyze in many vehicles. On the off chance that playing out these means did not accomplish chilly air from your vents or you are not happy with doing this work, you have to enroll the assistance of an ensured workman who has the instruments and the learning to test your cooling framework.

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