Hi I have a 95 e300 which I got a couple of months ago. The ac is not blowing cold air. Compressor clutch wasn't engaging and it didn't have freon because it seems has a leak somewhere.

I charged it with freon and the compressor clutched engage but acc fan did not turn on. I jumped the coolant sensor and the fan ran on and off. AC did not blow cold air. I checked the condenser it looks clean.

What else should I test? I checked the coiled resistor with a vometer and it good.

Can I jump the compressor? if yes, how?
And what are these sensors? Thanks

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1984 190D 160,000 miles -sold
1992 190E 124,000 manual 2.3 -sold
2000 c230K 84,000
1995 e300 134k