My air conditioner goes from cold air and normal air and sometimes a little bit worm in, like 10 minutes cold and like 5 normal or worm does, that means that is it I have to buy a new one?

Are you leaving the fan option on 'on' or 'auto'? You should always have it on auto when running the a/c.

XenoSapien

What fan, there r options for cold and fan, so if it is on low or high fan I am not getting any cold air, can u explain more, thanks

On your thermostat, there is only a cold and fan option and that is all?

XenoSapien

You really need to give much more info,, what kind of system do you have? Package heat and air,, is heat elect. Or gas? How old is a/c? When it quits cooling ,does the compresser stop running and then kick back on? Is your lowside line (the bigger) tubing sweating all the time it is running? is the big line frosting up after running for a while? Is the filter clean? With more info we might can help you,, thanks