Quote:
Originally Posted by joe_pau
Just had my compressor and receiver drier replaced. While driving, the AC is great. When stopped at a light, the compressor shuts down at 400 psi and the fan never kicks in, and it blows warm air. The mechanic jumped the AC switch and the same thing happened. Is it a relay? What would you look at next? Appreciate the thoughts and ideas.
Other then that the AC works great when the car is moving.
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Quote:
Originally Posted by joe_pau
That would be good information to have, huh? It's a 1988 190e 2.3, 4 cylinder. Thanks for asking
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Exact thing happened to my '93 190E 2.3 a few years ago and it turned out to be a blown fuse for the aux. fan. Replaced the fuse and no problems since.
If that is not your problem and the aux fan is working for temperature control but not the high side pressure for cooling the condenser, then I would verify that the high pressure switch with the pigtail on the drier/receiver is working correctly.
If the fuse is good and the aux. fan doesn't operate, also check the aux. fan relay in the rear of the main fuse box. I always check mine when I change the oil by shorting the connector at the aux. fan temp. switch. I can hear the relay click before the fan operates.