Turbo sock

[Nilao]

If the box seals on the blend door were shot then yeah, I could see shutting off the coolant to the heater core helping a bit being it seems the box on a t800 has both the evap and heater core in the same area. On my 387 the evap and heater core are on opposite sides so it's less likely to pull hot air even if the seals were shot.

Cleaning out the condenser will allow more air to flow through it and condense the gasses more efficiently. More liquid at the expansion valve=more temperature drop across the whole evap. If there is gas making it back to the expansion valve then some capacity is lost as it is the refrigerant flashing from liquid to gas that causes the temperature drop.