no heater blower and no compressor
 

i have a 91 300e, just bought it a couple of weeks ago and there is no response to any of the heating controls, the airconditioning compressor does not engage ,,,any ideas.....

Does hot air come out all the time?

Replace the fuses. Do not just look at them and think they are OK. next would be the OVP relay.

i replaced the #7 fuse but that made no difference...if i press the defrost button, there is hot air coming from the defrost ducts as long as the car is in motion...i should also mention that the 2 electric fans in the front are also not working, i unplugged them and ran a jumper down to them and they worked fine, so i know it is not the motors...

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