The Chrysler 300's air conditioner is a complex piece of machinery, so much so that most mechanics must be certified before their employers will let them touch an air conditioner. Not all maintenance procedures are that complex, however. Recharging a Chrysler 300's R-134a Freon level is fairly simple and can be done by any home mechanic. Recharging kits can be purchased at most automotive retailers, and the process does not consume a lot of time. If not recharged, the 300's R-134a will eventually leak out, and the air conditioner will not produce cold air.
Things You'll Need
- R-134a recharging kit
- Safety glasses
Open the Chrysler 300's hood and prop it up. Search the vehicle's engine compartment for a set of metal tubes. They will be made of aluminum (and will be of two different thicknesses). Locate the wider diameter pipe. It will be connected to the vehicle's compressor, and it will feature a low side pressure connection with a blue or black cap. Pull this cap off of the low side pressure connection.
Snap your R-134a kits coupler to the low side pressure connection. The coupler will be located at the end of the kit's service housing, and should easily fit the low side connection. If it does not, recheck your recharging kit. You may have bought an R-12 kit by accident. These kits are prefigured to fit the systems they are intended for. If you have an R-12 kit, return it to the store. Even if you could make it fit, the R-12 Freon will damage the Chrysler's air conditioning system.
Find a safe place to put the R-134a kit down. Some engine parts, like belts, may accidentally shift or move the kit. Ensure that the kit is not resting on any such parts.
Crank the Chrysler 300's engine and let it idle. Once it has warmed to its standard operational temperature, switch the vehicle's air conditioning on. Ensure the blower is on the hardest setting, and make sure the air temperature is at the coldest degree possible.
Walk a full circle around the Chrysler 300 and open all the doors. If you are in a tight garage, and you have no room for open doors, roll down all the windows. You have to do this for one important reason. Once the air conditioner begins to charge, it will produce refrigerated air. If the newly cooled air builds up in the 300's passenger compartment, the air conditioner may mistakenly turn itself off. You will need the system running throughout the entire process.
Return to the Chrysler 300's engine. Pick up the R-134a kit and open the valve. By turning the valve downwards, a needle will break the R-134a's seal and the refrigerant will charge into the system. Let 60 seconds of R-134a surge into the system.
Close the kit's valve atop the R-134a canister. Let the air within the air conditioner circulate for 60 seconds. Continue adding the R-134a in one-minute intervals. Shake the can while charging.
Monitor the kit's pressure gauge. Those pressure readings will indicate when the recharging process is completed. If you need outside verification, check the Chrysler 300's aluminum pipes. If they are universally and evenly cold, then the system is charged. Also, place a thermometer in the air conditioner's central vent. A charged system will cool air to 40 degrees Fahrenheit, unless the outside air is very hot. On a very hot summer day, the air conditioner can plateau anywhere from 40 to 60 degrees Fahrenheit.
Close the valve atop the R-134a canister, once the system is charged. Remove the kit's coupler from the low side pressure connection, but let the vehicle idle for 15 minutes before turning the engine and air conditioning off. By letting both run, you are letting the air conditioner's blower fully circulate the newly added R-134a Freon.
Tips & Warnings
- The R-134a canister will become extremely cold while the system recharges. Wear thick gloves. Nitrile automotive gloves will be too thin, and you may need to wrap the canister in a towel. R-134a is compressed and pressurized, so wear safety glasses while handling the canister.
- Recharging instructions may differ, depending on who manufactured the recharging kit. Always defer to manufacturer instructions over all others.
- "Chilton's Chrysler 300/ Charger/ Magnum: 2005 through 2007"; Joe Hamilton; 2008
- US EPA: Recharging Your Car's Air Conditioner with Refrigerant
- IDQ: How-To Instructional Videos
How do I Locate a Low Side Service Port?
A low-side service port is part of an automobile's air conditioning system. It can be found inside a vehicle's engine compartment on...
How to Add Freon to a Car Air Conditioner
When your car's air conditioner doesn't seem to be blowing cold air anymore, you may need to add Freon to the air...
How to Troubleshoot a Chrysler Concorde
Troubleshooting a Chrysler Concorde doesn't have to be complicated. The first point to remember when troubleshooting a Concorde is that you need...
How to Recharge an Auto AC
Recharging an auto air conditioning system is a fairly simple task. However, it does require some understanding of the system. The common...
How to Check the Transmission Fluid on a 2005 Chrysler 300C
You should periodically check the transmission fluid in your 2005 Chrysler 300C to ensure that it is clean and filled to the...
How to Replace a Chrysler 300M AC Accumulator
The Chrysler 300M has a receiver/dryer in place of an accumulator in its air conditioning system. The receiver/dryer is located between the...
How to Refill Air Conditioning in a Chrysler Sebring
If your Chrysler Sebring air conditioning unit is blowing warm air, the problem may be a small one that you can easily...
How to Add R-134a Refrigerant
Over time, the seals and connections in your vehicle's air conditioning system can allow a small amount of R-134a refrigerant to leak...
How to Recharge the AC System on a Chrysler LHS
If your air conditioner stops putting out cold air, your Chrysler LHS will probably need to have the freon levels charged. Freon...
How to Install R134A
In 1995, auto manufactures switched from R12 refrigerant to R134a because of Environmental Protection Agency mandates. The use of R134a gives you...
How to Add Refrigerant to a Chrysler Van
Your Chrysler van will take either R12 or R134a refrigerant. As of 1984, the Environmental Protection Agency has actively phased R12 out...
How to Recharge the AC on a Chrysler Pacifica
A Chrysler Pacifica's air conditioner will eventually deplete all of it's Freon. This is more of an inconvenience than a serious problem....
How to Charge the AC System for a Chrysler Town & Country
The air conditioning system of the Chrysler Town & Country is a sealed system and should never leak refrigerant, unless there is...
- Where Is the Battery in a Chrysler 300?