I probably currently have a similar problem like Sam G in this post:
https://6364cadillac.ning.com/forum/topics/comfort-control-temperat...
... but unfortunately in the moment there seems to be a little issue, adding a reply on this discussion.
I tested all the vacuum and resistance, ordered a new used transducer from Russ Austin which helped a bit, but not finally. When I'm driving everything is working perfectly. When the engine is in idle at a stop light etc. the AC switches to warm. Quite uncomfortable on a hot summer day. What I didn't tested before was the voltage from the alternator and/or voltage regulator. If the engine drops down to under 500 rpm the voltage drops from 14 to 13 Volts. And then the voltage to the transducer of course even get 1 Volt less and switches to warm.
In Tims book he doesn't write anything about it.
I don't think it's normal, right? So do I have to buy another voltage regulator? Or do I have another problem? Perhaps the alternator is not good anymore? It seems to be the original one from 1964.
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