Re: AC, no AC

[Elliott Potter <epotter@abraxis.com>]

Check the connections to the exterior ambient temperature sensor--if
it's disconnected, there's a good possibility that the A/C head unit
will default to whatever temperature it defaults at, i.e. 140F.
The A/C computer takes in this exterior temperature so that it knows how
much to cool the air that it sends into the cabin.  If the exterior
temperature is very low, the A/C won't kick in at all (at least on my
car); possibly if the A/C thinks that it's 140 degrees outside, maybe it
decides that it can't cope so it just shuts off.  So my first guess
would be to check that sensor out.

HTH

Elliott

> My 89 100's AC system is crazied, along with outside air temp sensor.
> 
> When outside temp indicator registers a bizzare temp (most of the time)
> i.e. 140F when actual temp is about 85F, the AC refuses to answer the
> call (no sound/feel of compressor engaging).
>
> When the outside air-temp indicator acts somewhat normally (rarely) the
> AC works like a charm.
> 
> I'm still waiting for shop manuals from rb, so any interim help/guidance
> would be appreciated.
> 
> Michael Murphy
> 89  100