AC issue on 2007 - Hyundai Forums : Hyundai Forum
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post #1 of 5 (permalink) Old 06-17-2017, 09:58 AM Thread Starter
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AC issue on 2007

I have an 07 2.0L and recently the AC cuts out at idle. After the car warms up when at idle the AC quits, I have verified the compressor clutch power cuts out but if I increase the RPM up to around 2K, everything works normal. I put a manifold gauge set on it and when operating the high side is 200-225 PSIG and the low side is around 35 PSIG so I do not think it is a Freon level issue. When the compressor clutch signal is on I have checked the power to the clutch with a lamp (turn signal lamp) and the power in is solid so I do not think it is wiring. It acts like it is being commanded off by an interlock or safety circuit. Has anyone seen this or have any ideas?
It is supposed to be over 100F today and my wife is holding me personally responsible for this problem


Second question: does anyone know where I can down load a shop manual or at least a diagram of this system???
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post #2 of 5 (permalink) Old 06-17-2017, 10:59 AM
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Check the pressure sensing valve on the low pressure side, when a idle and the system turns off.
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post #3 of 5 (permalink) Old 06-17-2017, 11:07 AM
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if that switch is cutting off it could be a flaky switch or it could be that your compressor is weak, esp if your have high mileage. But also could be a low refrig level - to be accurate they need to have the correct level of refrig by weight.
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post #4 of 5 (permalink) Old 06-17-2017, 02:03 PM
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Quote:
Originally Posted by gopbroek View Post
I have an 07 2.0L and recently the AC cuts out at idle. After the car warms up when at idle the AC quits, I have verified the compressor clutch power cuts out but if I increase the RPM up to around 2K, everything works normal. I put a manifold gauge set on it and when operating the high side is 200-225 PSIG and the low side is around 35 PSIG so I do not think it is a Freon level issue. When the compressor clutch signal is on I have checked the power to the clutch with a lamp (turn signal lamp) and the power in is solid so I do not think it is wiring. It acts like it is being commanded off by an interlock or safety circuit. Has anyone seen this or have any ideas?
It is supposed to be over 100F today and my wife is holding me personally responsible for this problem


Second question: does anyone know where I can down load a shop manual or at least a diagram of this system???
AC control diagrams/info attached.
Attached Files
File Type: pdf AC_1.pdf (419.3 KB, 7 views)
File Type: pdf AC_2.pdf (435.5 KB, 6 views)
File Type: pdf Triple Pressure SW.pdf (409.4 KB, 8 views)
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post #5 of 5 (permalink) Old 06-17-2017, 08:41 PM Thread Starter
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Well I tapped into the wires coming out triple pressure switch (Y/B & Y) the switch has continuity (12.4 VDC on both legs during operation and 0.2 ohms across the circuit) while the AC is working and after it cuts out out at idle. This should rule out the switch and pressure charge (?). Is anyone aware of another input that will cause the compressor clutch to be commanded off and how to test it?
Thank you wongpfh for the diagrams!!!!
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