Prior to recharging the
air conditioning system of your car, ensure that it has the latest
R134 refrigerant and not R12 refrigerant. Check the car owner’s
manual or the repair manual. In case you do have a repair manual then
you will have to do it yourself.
Cars which are
manufactured after 1994 are most probable to have R134 refrigerant.
In order to get the air conditioner recharged you will be required to
follow the below mentioned steps:
If your AC system has
been refilled before and you want to get it recharged again, then
looking for leaks is a good thing to start with. In order to get a
briefing on the system of air conditioners, search for ways the AC
system operates.
To get the AC recharged,
a pressurized refrigerant also known as Freon along with a pressure
gauge through which the quantity is checked in the system. There are
many tools and kits available for recharging the AC system however;
these tools are good for professionals or those who have to maintain
a fleet of cars. If this is not your case, then the all-in-one
toolkit is best for you. These kits include a can of R134 and a
pressure gauge.
Getting the recharge
kit ready
The items within the
recharge kit should be assembled as per instructions. Make sure that
the knob on the gauge is turned clockwise until it stops and then
hose it in the refrigerant. The assembly includes a pin which opens
up the can after every part is attached tightly. Moving the gauge in
a counterclockwise manner will pierce the pin into the can allowing
it to open up.
Assemble the AC
recharge kit
After a safe retraction
of the piercing pin, it is time to assemble the kit and the pressure
gauge. Screw tightly the rubber hose with the pressure gauge. At this
point, you should also calibrate the gauge. There are different
temperature settings at the face of the gauge turn the calibration
dial to the temperature of the area.
Tracing the port of
low pressure
AC system comprises of
two sides – the low pressure and the high pressure side however,
this greatly depends upon the relation with the compressor. AC
systems are recharged via the low pressure port. The caps of the
ports are marked as ‘H’ for high and ‘L’ for low pressure
ports however, you can check with the manual for double checking.
Attach the hose with the low port.
Cleaning the low
pressure port
Any debris entering into
the air conditioning system might cause it to fail prematurely. In
order to avoid this, clean the outer side of the cap before opening
the low pressure port and again after opening the cap.
Attach the hose and
test the pressure
Seal off the gauge by
turning it clockwise and then attach to the AC port. Attach the
rubber hose to the pressure gauge by using a simple and quick
latching mechanism. All you have to do is to pull the fitting back
outside, slide it slowly over the low pressure port and then release
it. Now start the AC at high temperature and see how much pressure
the gauge is building. Leave for a few minutes to get the gauge
settled down and to see how much you need to recharge the system.
Adding refrigerant
Turn the gauge
counterclockwise to get the piercing retracted. Attach the pressure
gauge with the refrigerant can. Now turn the gauge clockwise. Attaché
the rubber hose with the low port and switch on the AC. Leave for a
minute o get it pressurized and then turn the gauge counterclockwise
to release the R134 solution into the system. The outside temperature
will indicate when the system is full. Slowly rotate the refrigerant
back and your AC system has been recharged successfully.
Article Credit: http://autorepair.about.com/od/regularmaintenance/ss/AC-recharge.htm
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