Looks like it is time for some theories.

Brian Carlton - the schroud for the two cooling fans blocks 20-30% of the surface of the condensor. If after cleaning there is still some blockage is it reasonable to conclude that the cooling system is operating at the limits of its capacity and the shroud blockage pushes the system over its limit to cool under high cooling demand situations? The single fan on the 300sdl does not have a shroud and therefore very little condensor blockage.

Any thoughts on carving up the shroud to expose more condensor surface to air flow?

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Dick87