Here's the proper approach:
1. Professional Diagnosis is Crucial: Take your Dodge Ram to a qualified mechanic or an automotive A/C specialist. They have the tools and expertise to:
* Diagnose leaks: They'll use a leak detector to find where the refrigerant is escaping. A leak must be repaired before adding refrigerant; otherwise, you'll just waste refrigerant and money.
* Check system pressure: They'll measure the high and low side pressures to determine if the system is functioning correctly. Low pressure indicates a leak or other problem.
* Inspect components: They'll check the compressor, condenser, evaporator, and expansion valve for damage or malfunction.
* Identify the correct refrigerant type: Different vehicles use different types of refrigerant. Using the wrong type can damage the system.
2. Repairing Leaks: If a leak is found, it needs to be repaired. This might involve replacing seals, hoses, or other components.
3. Evacuating and Recharging (if necessary): After repairs (and only after repairs!), a professional will evacuate the old refrigerant (and any air or moisture) from the system and then recharge it with the correct amount of refrigerant. They use specialized equipment to do this properly and safely.
Never attempt to charge your A/C system yourself unless you have the proper training, tools, and safety equipment. Improper handling of refrigerants can be dangerous and harmful to the environment. The equipment is also expensive and requires technical knowledge to operate safely.
