My 62 Fairlane has a Victory Climate Systems aftermarket air conditioner. I recently had the system serviced which included vacuuming out the system and recharging. I have three vents mounted below the dash. The air is cold blowing out but it never gets the car cool enough to have to turn down the fan on mid 80's degree day. Is there anything I should adjust, or is it simply not enough air flow to overcome all the glass in the car?