I have 4 blinks from the light .I have a Trane XB80 it will work fine then after it reaches the stat temp when it goes bac on it blows cool air I watch and sometimes it tries to light and others it doesn't try to light it just blows cool

Four blinks is high limit switch, check filter, and make sure nothing is blocking your vents or returns. If all is clean and clear. The next thing would probably be high gas pressure or the limit is getting weak

My AC is not cooling house seems that a lot of air is blowing out around AC unit not through duct could it be a blockage in ductwork or else where.
Also seems to be a lot of condensation on unit, frozen pipe maybe? I hope you can help me Im very handy with things just need to know what to look for. Thanks Twila