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Old 07-09-2014, 02:10 PM   #1
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A/C Question


93 degrees temperature out and gauges say 30/190. According to Ford spec chart for ac, the low side is low and the high side is within range.

Thoughts about these numbers? A/C is cycling at 46 degrees and kicks back in at 56 degrees, then starts all over.

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Old 07-09-2014, 02:36 PM   #2
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Both pressures seem low, probably low on charge. Open all car windows, set a fan aiming at the condenser, max AC, blower on high. Increase and hold engine speed to about 2,000 RPM's. Let gauges stabilize and what are they?

There is a Ford tech on here, if he answers, listen to him.

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Old 07-09-2014, 07:51 PM   #3
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My guess would be a little low too. At that ambient temp high side should be in the low to mid 200's. Low side is usually low 40's. If it is cycling fast it is a good sign of low charge. It should have dye in from the factory if it is a newer car to help find leaks.
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Old 07-09-2014, 08:18 PM   #4
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Originally Posted by cjm94 View Post
My guess would be a little low too. At that ambient temp high side should be in the low to mid 200's. Low side is usually low 40's. If it is cycling fast it is a good sign of low charge. It should have dye in from the factory if it is a newer car to help find leaks.
New truck, 2013 bought last November. Its not a rapid on off cycle like you get with a system that is known low, but cycles regularly (constantly) off at the low end at 44-46 degrees and back on when it hits 56 degrees.

Its under warranty so I guess I need to take in?
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Old 07-09-2014, 08:37 PM   #5
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Could be temp blend door actuator sticking. I have seen quite a few fail causing warm air when asking for cold. Not uncommon to cycle like that.
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