Many things can go wrong with a car or truck A/C system with the most common being the unit has a low refrigerant charge.
Once all other possible problems are eliminated recharging a system is an easy task that most any home DIY mechanic can do.
Of course, if in doubt take it to a professional.
Refrigerant recharging kits are readily available that anyone can buy to get their A/C back to blowing cold air.
Air Conditioner Recharging kit on Amazon
Interdynamics (GBM-3CSCA) R-134a Trigger Charging Hose with Gauge
What Refrigerant Does your Car or Truck Use?
There are two types of refrigerant that vehicles use R12 and R134a.
R12 is mainly used in older cars and trucks built before 1995.
R134a is used on vehicles built after 1995.
If your vehicle was built after 1995 it more than likely uses R134a as R12 was banned do to environmental concerns.
For those who have a vehicle built close the 1995 date a sticker should be located on the system somewhere that displays the refrigerant used or alternatively it can be looked up online.
How to Recharge a Car or Truck Air Conditioner
- A recharge kit is needed. In this example we are using the Interdynamics Arctic Freeze Recharging Kit but there is many R134a kit options.
- Be sure to were gloves and eye protection in case of any accidents.
- A 14oz can of R-134a is in the kit which the top plastic cap needing to be removed.
- The cap is screwed onto the bottle.
- A/C systems have two tubing lines for High Pressure and Low Pressure.
- Next start the engine and turn the air conditioning to Max Cool with the fan set to the highest setting.
- Check and be sure the compressor is running as it needs to be running to get a charge into the system. You will know if it is running as it will be spinning.
- Attach the hose from the bottle to the Low Side port.
- The gauge will show what the charge state of the system is. Keep in mind overcharging a system can possibly damage components and the unit will not work properly.
- To add more refrigerant squeeze the trigger on the can.
- Once the unit is charged remove the hose and replace the cap. The unit should now be fully charged.
Locate the Low Side port on the A/C system.
When adding refrigerant into the system do it slowly and check the gauge as to get the right amount into the system.
The gauge will show Green for Low, Blue for Filled, Yellow for Alert, and Red for a Overcharge.
Charging a vehicles air conditioning system is an easy task that most any backyard mechanic can do.
As when working on any car problem be sure to wear the correct protective gear.
Before charging a unit be sure of what the problem is. If it is only a slow leak than a cheap DIY charge may be a good temporary solution.
Also before charging be sure the compressor is running as that may point to a another problem.