Yep, another compressor won't engage post.

New parallel flow condensor (original condenser sprang a leak). More oil (150 ml - 50 for each of the condenser, drier, lines).

Vacuumed to 26 mmHG for 2 hours, and recharged with equivalent of 3 lb R12 with Envirosafe R12. Low and hi side are 75 PSI. But the compressor won't engage.

I shorted the pressure and temperature switch and the aux fan and compressor wouldn't switch on. Fuse 8 (compressor) is good.

What the hell is going on? Why won't the aux fan switch on? Geez, I thought I knew what was going on with the AC on the W123.

Pissed off.

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1983 240D Silver/Blue "Sadie", unknown miles. 100k miles on WVO single tank, converted to 2 tank about 10k miles ago, FPHE, Injector Heaters, Aux Fuel pump. Alcohol/Water injection. Frantz oil bypass filter
1992 300D 2.5 Turbo Green/Tan "Jade" 267K miles Stock.
1992 300D 2.5 tan/tan "Rocky" on 2 tank WVO. Pressure actuated Turbo "rat's nest" surgery completed. 197k miles