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How to install condensor fan into a 1989 Blazer

bob234 on Tue September 07, 2010 3:21 AM User is offline

Year: 1989
Make: Chevrolet
Model: Blazer
Engine Size: 4.3
Refrigerant Type: R12

I finally got the A/C working good in this Blazer. I did the basic mods, used a blue orifice tube, and turned the cycling switch down a little. Now it will make my fingers go numb on the interstate and blow 33 degree vent temps, but when I am at a red light it will only blow 60. I see ACkits has reversible fans for this purpose. How would I wire one of these in, if mine isn't configured to have one. A guy at autozone said to hook the relay to your compressor switch, and the + and - straight to the battery. Only problem is mine doesn't have the switch, it just has the shipping plug where one would go. I know people have done this before, so if anyone has a idea, let me know.

bohica2xo on Tue September 07, 2010 12:26 PM User is offline

You can trigger the relay from the harness at the cycling switch.

If you use the wire that is switched, the fan will cycle on anytime the compressor is running. The fan will not hurt anything by running at highway speeds.

Watch those 33f vent temps - if you set the cycling switch too low you will have ice formation on the evaporator. If your cabin airflow drops on long trips, you may need to raise the cutoff pressure a little bit.


"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

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