Upon arrival found downstairs disconnect turned off. Turned system on and checked unit. Checked filter and air flow, checked pressures and systems txv was not metering the refrigerant correctly, went to Lennox, pumped system down, replaced filter dryer, pressure tested, pulled vacuum down to 500 microns, purged system and released charge back into system. Pressures looked a lot better and line temps did too. System is now cooling properly at this time. Done under warranty.