• How do I locate my low pressure port?
• What about so called "drop in" refrigerant that I see advertised on the market?
• Can I add R134a directly to my R12 system?
• My A/C is blowing cold but not as cold as I would like it. Will adding additional refrigerant make the air colder?
• If I put in refrigerant (top off), do I need to add oil too? If so, what type and how much?
• How much refrigerant should I put in?
• Do I need to vacuum out my system before charging?
• I get two pressure readings while checking my low-side pressure, which one should I use?
• What is Ambient Temperature and what should my pressure readings be?
• How to recharge with a T-handle or Gauge-Handle style recharge hose?
• How to recharge with a trigger style recharge hose?
• Is an overcharged system dangerous?