The air conditioner on our 2007 Dodge Ram 1500 hemi will not cool the cab when it gets above 70 degrees. There is freon in the system air cold. It's impossible to use in the summer. Any suggestions?

jammed Dampers or damper motors. bad.
the FSM book factory service manual covers that
why not read it?
or at mitchell1 diy ,dot com pay them to read.

most a/c system have a flap in the system that allows you to decide wether to get fresh air from outside or recirculate the air in the car. One is to stop you getting drowsey fromn any gasses getting into the car and the other is to get the cool air colder by recooling already cold air. Try closing the flap and see what happens

Compressor change should have no effect, presuming it is working correctly. Have a qualified shop diagnose the system, there are tons of items involved, pressures, tempratures, heating system, etc. Remember that you are heating OUTSIDE air unless you are using recirculation setting...Hard to lower outside air to cool during the short time that the air is in the evaporator coils.

There is no standard interval for the CE/MIL light. You need to get the codes scanned at a local AP store to see what codes you have.

ac has freon and is not cooling and the compressor is on

plus one on the cooling fan problem. if it was low on charge then as you slow down, condensor temps and line prressures would raise therefore it would cool at low speed and and not when moving since the incoming air would drop system temp,reducing line pressure and then cusing compressor to cycle. the auxillary cooling fans must be on whenever a/c is on, if not, thats your problem. get this taken care of because if you get stuck in traffic, your engine will overheat also if fans are not running

clean out or renew the pollen filter ,passenger side below dash under glovebox and you should see a long narrow detachable cover .but you might have to remove the glovebox to get it out ,never worked on one of these here in spain so i havent a clue where it is .but thats your problem the pollen filter is blocked

To get the refrigerant in you have to have a technician purge the system first. Hope that helps.

I have a 1996 Dodge Ram 1500 club cab. I have had my a/c recharged but it is only blowing barely cold air. It used to shut down when I accelerated and blow hot air before. I don't have that problem anymore except barely cold air. Any solutions?

Yes It can and It should not void the warranty. Contact your dealer.