Weird AC issue on Sedona 11 - Kia Forum

 
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post #1 of 4 (permalink) Old 07-03-2019, 09:50 AM Thread Starter
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Weird AC issue on Sedona 11

We have a 11 Sedona. The AC is blowing hot air. I check the compressor and the pressure. The both are normal working condition. When the AC is on, the compressor is turning. Pressure on the low port goes to about 40 psi and the high port goes to 150 psi. When the AC is off, the compressor is not turning and pressure readings are about 100 on both side. Any suggestion on next step? Thanks.

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post #2 of 4 (permalink) Old 07-03-2019, 02:28 PM
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Is the pipeline leading to the A coil in the dash cold and sweating? If yes, could be something obstructing A coil, or perhaps a HVAC door is not opening or closing correctly...
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post #3 of 4 (permalink) Old 07-03-2019, 03:00 PM
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Just an opinion but considering that the front and rear have separate TXV and Evaporator - if they're both blowing hot (cooler/same/hotter than surrounding air?) then it's something else that's common to both. If one is cold while the other isn't then that would make things a lot easier to isolate.

Gaining access to the rear evaporator might be easier to achieve that the one in the dash. That way you could determine the temperature of the inlet/outlet pipes and the evaporator itself - eliminating/identifying a problem with the HVAC doors not closing properly thereby blending hot air. Either way (front/rear) not a quick job.

Out of curiosity, does the compressor stay engaged (when on MAX AC) continuously and are the radiator fans engaging once the pressure increases (only 150 psi?).
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post #4 of 4 (permalink) Old Today, 07:17 PM
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150 on the high side while operating is very low for R134a system unless your ambient temperature is 65 degrees F.

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