Arthur, You were right. The ambient temperature today was 20C (68F). I turned the AC on, let the engine idle, and after a few minutes my single working fan came on. So that's good. I guess I was low on R134.

I do however want to charge the system properly by my Indi, but am paranoid of him attaching anything to my high pressure side schrader valve, for fear it will start leaking again. Can a vacuum and recharge (by weight) be done to the system through the low pressure connection only? Will additional oil be needed?

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'95 E300 Diesel, 264,000 Miles. [Sold it]