Hi Scotty.
I have a 2006 Kia Sportage EX 150k miles.
When engine's cold, AC will come on & blow fairly cold (these are 100° days in Texas).
When the engine temperature comes up, the air suddenly blows warm, but here's the odd clue...
Obviously when I get on the freeway, I can feel the air cool down, but sitting still, if I get the RPMs up to 3000, it goes cold again.
The freon is not low, and I can hear the clutch engage, but it seems the corresponding click I'm used to hearing isn't quite as loud, but that may be my imagination.
I've heard this may be a high speed engine fan relay, or a TXV valve.
What can I do to get the air blowing cold at a stop again?
Any help would be appreciated.
Thanks Scotty!
-Cam
Is your condenser fan working?
In this year model, there is no separate condenser fan. The fan does run. Given the air goes warm when the engine temp gauge gets just short of the midline, I'm wondering if the hi fan relay may not be working.
That seems to be the case with some newer vehicles, I usually work on older ones that have a pusher fan right on the condenser. So yeah I'd think the fan you do have would have be running at high speed to get enough air across the condenser. Also be sure the condenser fins are open and not bent closed or blocked with dirt and debris.
Good advice, but not sure it explains the AC suddenly going warm when engine reaches a given temp. Any thoughts on that?
Hard to say, that's kind of weird. Maybe a sensor shutting signalling the computer to shut the AC down when the engine heats up. Main thing I'm looking at is cooling improving at freeway speeds. I have that symptom myself on hot days due to a bad condenser fan (poor airflow through condenser).