I need to try one of these because mine blows luke warm air all day long! The only time it feels nice and cold is first thing in the morning and at night. Other wise it can't take the 100+ weather we have here in So Cal.

 

Some folks with poor idle performance AC systems may want to inspect your condensers and make sure they are not clogged with bugs and bug guts and juice. This can help marginal systems some but for the most part the clutch, compressor, air gap, and freon/oil and charge levels must be in the working range.