[UncleBob]

you're making some rather big assumptions. You are taking what they said and deciding what was false and what was true.

here's the facts, they charged the system and it worked OK for a day. THey could not find any leaks at the time of charging it.

For a system to stop working in a day, you would need a HUGE leak. Either there is something else wrong, that would be rather odd because it worked after charging, or you have a huge leak, and they simply didn't find it.

If you have that big of a leak, then yes, you most definitely have air in the system.

Again....find another shop. One that is good at finding leaks. If its that big, it definitely wont be hard to find!