Upon my arrival I spoke with the customer about their concerns with the HVAC system not cooling properly. Starting in the attic at the furnace I found the heat transfer media coil extremely froze over. I turned the furnace on and after an hour I was able to get it thawed enough to diagnose the system. Checking the pressures I found that the pressures were good and that the refrigerant pressure control had faulted flooding the indoor coil causing it to freeze. Checking amp draws on the outdoor system I found the exhaust removal system pulling more amp draw then manufacture recommended. I spoke with Billy on the phone and let him know once I get part verification in the morning I will email the options over. I will follow up tomorrow afternoon around 1:00pm to answer any questions he may have.