• How do I locate my low pressure port?
• Why is there a smiley face on the bottom of some of your cans?
• What about so-called "drop in" refrigerant that I see advertised on the market?
• Can I just vent the refrigerant if it is overcharged?
• Can I add R-134a directly to my R12 system?
• What should my vent temperature be?
• My A/C is blowing cold but not as cold as I would like it. Will adding additional refrigerant make the air colder?
• How do I use an R-134a charging hose to add/recharge R-134a refrigerant to my system?
• If I put in refrigerant (top off), do I need to add oil too? If so, what type and how much?
• Can I recharge my A/C system myself?
• How much refrigerant should I put in?
• Can I use your products in my hybrid vehicle?