low high-side pressure, help

[Gary]

If we can believe the low side gauge, which is uncertain at this point, then the SST is about 41F. The suction line is 55F, so 55 - 41 = 14F superheat, so we are picking up a heavy heat load with a fully activated coil. So why isn't it cooling your house? Either it isn't large enough to do the job or you are trying to cool the world (leaking and/or uninsulated ducts in hot areas?). Is this an attic unit?

Air in/out temps at the air handler will give us a better idea of what is going on with this.