Intermittent A/C - Page 2 - Taurus Car Club of America : Ford Taurus Forum
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post #11 of 17 (permalink) Old 06-08-2019, 09:41 PM Thread Starter
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I had my blower manually cranked to the highest setting this time around. While I don't remember exactly, it's entirely possible that my blower speed was on the low to medium settings during the first data log, but both times the climate system was set to "MAX A/C." It seems to me that MAX A/C should crank the blower to max, but my climate control system never wants to bring the blower speed above 50% automatically, and anything above that has to be manually adjusted. Does this sound like a failure of some sort?
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post #12 of 17 (permalink) Old 06-09-2019, 10:09 AM
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I think that is normal automatic operation. Testing should be done in manual mode, max cool, high blower, doors open.
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post #13 of 17 (permalink) Old 06-10-2019, 10:13 PM Thread Starter
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Well, after all this troubleshooting effort, it's turns out the system was just overcharged. I drove about 90 minutes away in 90 degrees stuck in traffic, and when I got there I decided to grab a screwdriver and just engage the Schrader valve in the chance that I could just get it to engage the compressor at all. Two good purges and the compressor engaged and stayed engaged. It was acting up again on the way home from work, with temperatures getting up to 97 degrees, so I let out a bit more pressure and the compressor kicked back on and stayed on to blow icy cold air in the sun. I'm now running 30ish psi on the low and 250psi on the high in 95 degrees, which seems a lot more reasonable. I also noticed that the radiator fans kicked down in speed after letting some pressure off, and the "auto" fan actually went all the way up to full blast in "max a/c mode". Apparently it's all connected!

Thanks for the help, guys!
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post #14 of 17 (permalink) Old 06-11-2019, 10:22 AM
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How did it get overcharged?
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post #15 of 17 (permalink) Old 06-12-2019, 02:53 PM
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Don't ask, he might just vent more to the atmosphere! Rookies!
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post #16 of 17 (permalink) Old 06-13-2019, 04:10 AM
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Originally Posted by rsteve56 View Post
Don't ask, he might just vent more to the atmosphere! Rookies!
Yeah I would have preferred OP take it to a professional to get manifold readings instead of just venting to atmosphere and calling it fixed.


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post #17 of 17 (permalink) Old 06-13-2019, 10:11 AM Thread Starter
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Quote:
Originally Posted by Automender12345 View Post
How did it get overcharged?
When I first popped the cap off, I noticed that it appeared the system had UV dye added to it at some point, so I suppose it was overcharged when I purchased the car second hand.

And don't worry guys, I'll capture a few cow farts to make up for my horrible travesty of venting an ounce or two, and take all my old vehicles that are at risk for leaks to preemptively have all their refrigerant evacuated and tell all my friends to do the same. 👍
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