How To Service Auto Air Conditioning System

There is never a skilful time for your air conditioning in your automobile to stop working, but it typically seems to happen in the dead heat of summer. If your Air conditioning organization has either quit working or has stopped working well, you're faced with driving your vehicle around with the windows down - which brings fiddling relief when information technology is hot outside. Having some cognition about how the ac works in your vehicle can help y'all become the arrangement operation once again.

Part 1 of 9: Understanding the AC system and components

Your car's air-conditioning system works just similar a refrigerator or your home air conditioning. The purpose of the arrangement is to remove hot air from the inside of your vehicle. It consists of the following components:

Component 1: Compressor. The purpose of the compressor is to pressurize the air conditioning organization and circulate the refrigerant. Information technology's located at the front of the engine and is typically driven by the main drive belt.

Component two: Condenser. The condenser is located in the front of the radiator and is used to remove heat from the refrigerant.

Component iii: Evaporator. The evaporator is located inside the dash of the vehicle and is used to absorb heat from the interior of the machine.

Component 4: Metering device. This is known as a metering tube or an expansion valve and tin be located either nether the dash or under the hood virtually the burn down wall. Its purpose is to change the pressure level in the air-conditioning system from loftier pressure to low pressure level.

Component 5: Hoses or lines. These consist of metal and rubber lines to carry the refrigerant.

Component six: Refrigerant. Typically, all systems today contain R-134A refrigerant. This can be purchased over the counter at most auto parts stores. Older vehicles were built with R-12, which is no longer used considering it contained high amounts of ozone depleting compounds. If yous have a license and certification you tin still purchase this, though most people opt to retrofit this system to the newer R-134A refrigerant.

Though these are the primary components of the air conditioning system, your vehicle has a serial of electric circuits that allow information technology to office, too as a dash arrangement that contains numerous doors that move inside the dash that can impact effectiveness. Below are the most common causes of poor air conditioning functioning and what can be done to get you comfortably back on the road.

When performing whatsoever air-conditioning organization service you must have the proper tools - and do caution when using them.

Reason 1: High pressure. The air-conditioning system is filled with high pressure refrigerant, and can operate at over 200 psi, which can exist very dangerous.

Reason ii: High temperature. Parts of the AC system can reach well over 150 degrees Fahrenheit and so be very careful when coming in contact with parts of the system.

Reason 3: Moving parts. You must spotter out for moving parts under the hood while the engine is running. Go on all articles of wearable tightly secured.

Materials Needed

• Ac manifold estimate set
• Gloves
• Refrigerant
• Condom Glasses

• Wheel Chocks

• Warning: Never add anything merely the recommended refrigerant to the AC organisation.

• Warning: E'er wear safety glasses when servicing whatever pressurized organization.

• Alarm: Never install the gauges with the organisation running.

Function iii of ix: Performance check

Step i: Park your vehicle on a level surface.

Footstep ii: Identify the bike chocks effectually the driver side rear tire.

Stride 3: Open the hood.

Step 4: Locate the ac compressor.

• Tip: The compressor volition be mounted towards the front of the engine and is driven by the engine drive belt. You may need a flashlight to be able to see it. It's one of the larger pulleys in the organization and has a dissever clutch located on the front of the compressor. It volition also have two lines connected to information technology. If you lot accept trouble locating it then kickoff your engine and plough the air conditioning off. The compressor pulley will exist spinning with the belt, but you should notice that the front end of the compressor clutch is stationary.
  

Step five: Turn on the Air conditioning. Turn the air conditioning on in the vehicle and run into if that clutch that was previously stationary is now engaged.

Pace 6: Turn the fan to Medium. If the compressor clutch engaged, render to the inside of your vehicle and turn the fan speed to Medium.

Stride 7: Check the air temperature. Meet if the temperature of the air coming from the main nuance vents is cold.

Read the parts beneath to understand the dissimilar conditions that y'all may see:

• No air coming out of the vents
• The compressor clutch not engaging
• The clutch is engaging only the air not cold
• The system is empty on refrigerant
• The system is low on refrigerant

Part 4 of ix: No air comes out of the dash vents

When performing your initial check, if air does not come from the center dash vents or if the air is coming from the incorrect vents (such equally the flooring or windshield vents) then you lot have a problem with the interior climate control organization.

• Airflow problems tin be caused past annihilation from a blower motor problem to an electrical consequence or a module failure. This would need to be diagnosed separately.

Part v of ix: The compressor clutch does non engage

The clutch may not engage for several reasons, the near common beingness depression refrigerant in the system, but it may also be an electrical outcome.

Reason 1: Voltage. Voltage is not sent to the clutch when the air conditioning is turned on due to an open up circuit in the electric circuit.

Reason 2: Pressure switch. An air conditioning organization pressure level switch can disrupt the circuit if certain pressures are not met or if the switch is failing.

Reason iii: Input effect. More upwards to date systems are computer controlled and apply numerous other inputs including vehicle interior and exterior temperature to determine whether or non to turn the compressor on.

Y'all demand to make up one's mind if there is refrigerant in the organization.

Footstep 1: Plow the engine off.

Step 2: Install the gauges. Install the gauge set past locating the loftier and low side quick connections.

• Tip: The location of these vary on every car, but nearly of the time yous will discover the low side on the passenger side of the engine compartment and the high side towards the front. The size of the fittings are different so you will non exist able to install the judge set backwards.
  

Step three: Observe the pressure readings on the gauges.

• Warning: Do non check for pressure by pressing on the fitting to run into if refrigerant comes out. This is dangerous and it is illegal to vent refrigerant into the temper.

• If the reading is zero y'all take a major leak.

• If at that place is pressure but the reading is below 50 psi then the arrangement is low and may just need to be recharged.

• If the reading is above 50 psi and the compressor is not engaging then in that location is either a problem with the compressor or y'all accept an electric system failure that needs to exist diagnosed.

Part 6 of 9: The clutch engages but the air is non common cold

Step 1: Turn the engine off and install the gauge set.

Step 2: Restart the engine and turn on the air conditioning.

Step 3: Observe the pressure readings.

• Though every air conditioning organisation will vary, yous desire to see the high side pressure level around 20 psi and the low side around 40 psi.

• If both the loftier and the depression side are beneath these readings then you lot may need to add refrigerant.

• If the readings are very high then you may have a problem with air trapped in the organisation or an airflow trouble with the condenser.

• If the pressures practice non change at all when the compressor engages then the compressor has failed or there is a problem with the metering device.

Part vii of nine: The system is empty

Materials Needed

• Refrigerant dye

If there was non pressure found during your test and so the system is empty and there is a leak.

• Almost air workout organization leaks are small and difficult to find.

• The nigh effective way to locate a leak is with refrigerant dye. Dye kits are sold at most auto parts stores.

• Using the manufacturer's instructions, inject the dye into the air conditioning organization. This is commonly done through the low pressure level service port.

• Allow the dye to works its style through the arrangement.

• Using the supplied UV lite and glasses you will inspect all of the components and hoses of the air conditioning system and await for any glowing fabric.

• Virtually dyes are either orange or xanthous.

• Once you find the leak repair it every bit needed.

• If the organization was empty then information technology will need to exist fully evacuated and recharged.

Part 8 of 9: The system is depression

• When adding refrigerant to the system you want to accept it tedious as you lot do not know how much it actually needs.

• When a shop performs this duty, they utilise a machine that pulls the refrigerant from the system, weighs it, and then allows the technician to add the exact amount of refrigerant dorsum into the system.

• Most store-bought refrigerant kits come up with their ain charging hose and gauge that allow yous to add together refrigerant yourself.

Step 1: Turn off the engine.

Footstep 2: Disconnect depression side estimate. Disconnect the gauge set from the depression side port.

• Tip: Yous must only charge on the low side to forbid injury.

Step 3: Install charge kit. Install the charging kit to the low side connection on the Air-conditioning system.

Pace iv: Plough on engine. Turn on the engine and the air conditioning.

Pace 5: Observe. Observe the approximate on the kit and begin adding the refrigerant whether it be with a button or a trigger on the kit.

• Tip: Add the refrigerant in small amounts, checking the recharge gauge betwixt applications.

Stride 6: Reach desired pressure. Cease adding when the gauge is steadily in the dark-green surface area, which is usually betwixt 35-45 psi. Permit the system to continue running and cheque the temperature of the air coming out of the dash vents making sure it is cold.

Step 7: Disconnect the charging hose.

You have now filled the system with refrigerant. Make sure that you practice non overcharge the system as besides much refrigerant is but equally bad - if non worse - than too piffling.

Part ix of 9: The air conditioning yet does non work

• If the air-conditioning even so does non work as desired further testing is needed.

• Warning: You lot must have a special license to legally service an air-conditioning organisation.

This system tin be extremely complex, and takes numerous other tools and repair manuals to correctly diagnose in nearly vehicles. If performing these steps did not reach cold air from your vents or you are not comfortable with doing this piece of work, you need to enlist the aid of a certified mechanic who has the tools and the cognition to test your air-conditioning organization.

The statements expressed to a higher place are only for informational purposes and should be independently verified. Please encounter our terms of service for more than details

Source: https://www.yourmechanic.com/article/how-to-charge-the-air-conditioning-system-in-your-car

Posted by: gibsonficepleturem.blogspot.com

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