Nick1994
$100 site donor 2024
On my 2018 Genesis 3.3T, I’ve been having some issues with the A/C, the temperature is pretty inconsistent. In June 2024 the compressor was failing, and the dealer replaced it along with the condenser. For the rest of the summer it was fantastic and cold, 38*-40*.
This summer it has been inconsistent, and it seemed to warm up the most at idle and low RPMs, for example waiting for a Walmart curbside pickup it would warm up to 60* but if I gave it a little RPMs it would cool down to closer to 40*.
I took it into the dealer a couple weeks ago and they evacuated the refrigerant and refilled it, said it was a whopping 2 ounces low. They did add some dye this time though.
It does seem a little bit better, but it’s still really inconsistent. I park in a parking garage at work so my car doesn’t bake in the sun, leaving work it cools right down no issues, 40* air. After a couple miles, hard to pinpoint but usually when coasting to a red light, it’ll start getting warm. It feels like the compressor kicks off because the air warms up toward 60* before it starts cooling again, and it feels really humid and gross. Once I get going again, it’ll usually cool right back off. After 5-10 miles on the freeway, if I start coasting for a traffic slow down is when it seems to act up again, humid air, fluctuating temperature getting warm, even though I may still be going 40 mph.
What’s weird though is it doesn’t always happen at every slowdown, and I can park in front of my house after driving home and the air will sit at a perfect 40* and freeze you out.
I will say though, when it warms up and I’m either stopped or almost stopped, once I take off I can hear refrigerant in the lines start flowing with some RPMs, then it starts cooling good again. I can’t perfectly pinpoint it though.
My cabin air filter is clean, the condenser is clean, the radiator fan is blowing great, I usually use recirculate but it sometimes flips itself over to outside air. I usually like Auto, and set the temp for the car to like 72 and it’s been perfect for the almost 2 years I’ve had the car, until this past 8 weeks or so. So I’ve tried the lowest temperature and choosing fan speed on my own, the old fashioned way. Either way it still does the issue.
Here’s a video I just took, feel free to skip through it. I manually downshifted to get some RPMs since it started warming up and then it started cooling down. I then pulled over to a stop and it started warming up, so I drove through the neighborhood in manual mode so I’d have some more RPMs and you can see the temp going down.
I called my service advisor and he wants me to swing by and have the tech do a ride along the next time I bring it in, but I’d like some more ideas to present since they can only bill my extended warranty if they find a real problem, I was out of pocket for the A/C recharge the other week.
One thing to point out since it’s inconsistent, last Saturday I put 160 miles on it mostly freeway. I did sit and idle for about 30 min picking up a friend from the airport, getting back on the highway for a long distance and then idling a lot in super slow traffic (concert) and had no issues that day. It’s a crapshoot.
It’s 110*+ outside here in Phoenix, need good A/C!
This summer it has been inconsistent, and it seemed to warm up the most at idle and low RPMs, for example waiting for a Walmart curbside pickup it would warm up to 60* but if I gave it a little RPMs it would cool down to closer to 40*.
I took it into the dealer a couple weeks ago and they evacuated the refrigerant and refilled it, said it was a whopping 2 ounces low. They did add some dye this time though.
It does seem a little bit better, but it’s still really inconsistent. I park in a parking garage at work so my car doesn’t bake in the sun, leaving work it cools right down no issues, 40* air. After a couple miles, hard to pinpoint but usually when coasting to a red light, it’ll start getting warm. It feels like the compressor kicks off because the air warms up toward 60* before it starts cooling again, and it feels really humid and gross. Once I get going again, it’ll usually cool right back off. After 5-10 miles on the freeway, if I start coasting for a traffic slow down is when it seems to act up again, humid air, fluctuating temperature getting warm, even though I may still be going 40 mph.
What’s weird though is it doesn’t always happen at every slowdown, and I can park in front of my house after driving home and the air will sit at a perfect 40* and freeze you out.
I will say though, when it warms up and I’m either stopped or almost stopped, once I take off I can hear refrigerant in the lines start flowing with some RPMs, then it starts cooling good again. I can’t perfectly pinpoint it though.
My cabin air filter is clean, the condenser is clean, the radiator fan is blowing great, I usually use recirculate but it sometimes flips itself over to outside air. I usually like Auto, and set the temp for the car to like 72 and it’s been perfect for the almost 2 years I’ve had the car, until this past 8 weeks or so. So I’ve tried the lowest temperature and choosing fan speed on my own, the old fashioned way. Either way it still does the issue.
Here’s a video I just took, feel free to skip through it. I manually downshifted to get some RPMs since it started warming up and then it started cooling down. I then pulled over to a stop and it started warming up, so I drove through the neighborhood in manual mode so I’d have some more RPMs and you can see the temp going down.
I called my service advisor and he wants me to swing by and have the tech do a ride along the next time I bring it in, but I’d like some more ideas to present since they can only bill my extended warranty if they find a real problem, I was out of pocket for the A/C recharge the other week.
One thing to point out since it’s inconsistent, last Saturday I put 160 miles on it mostly freeway. I did sit and idle for about 30 min picking up a friend from the airport, getting back on the highway for a long distance and then idling a lot in super slow traffic (concert) and had no issues that day. It’s a crapshoot.
It’s 110*+ outside here in Phoenix, need good A/C!
Should you be able to hear refrigerant in the lines? I've owned A LOT of different vehicles and have never heard that.
