Kirk,
The "leaks" I'm referring to are not leaks in the house windows, doors, etc.. It's leaks directly within the intake path leading to the air conditioner sucking in air from the outside in addition to the recirculated air it's sucking from inside the house.
What this type of leak does is constantly introduce hot outside air into the air conditioning unit's intake - which of course raises the temperatue of the air entering into the house from the air conditioner over what the temperature that air would be if it was only coming from recirculating air originating in the interior of the house.
This type of leak may result from the air conditioning unit not being sealed down tight enough onto the RV's roof. I almost annually tighten the bolts that pull our A/C unit into the rubber seal between it's intake and the coach's roof.
