I'm not having a problem with the EC light staying on. As Dan suggested I tested the pressure sensor at the drier - it read ~1.75V (well below the 5V warning level he suggested).

Also, I tested the refrigerant level...per my reading I got 45 PSI right on the top edge of full - almost too high. To my knowledge the system has never been recharged.

I can hear the comressor turn on...yet it's taking a long time to cool and when it does the air temp is only at 61*F.

Any other suggestions?