IDoSeaDoo
Veteran Member
This season, I put gauges on the jetta and added some Freon to it. Pressure is about 250/1something high/low respectively with the ambient air near 90F. I forgot the exact readings, it's been a while... but I remember it was in line with the R134 chart online for that air temp. AC comes out cool, but not like my wife's 2012 Civic, which blows snowballs. I measured the air and it's around 60F coming out of the registers, but sometimes, while I'm driving and don't have a thermostat handy, I feel that the air is closer to 75. That far left vent feels like it's ambient temp.
So what gives? I feel like I'm not low on Freon. Only thing I can think of is the expansion valve not opening properly. However, I've been getting pelted by the rotting vent insulation for years now. I'm wondering if maybe the vent door that mixes how and cold air has deteriorated and is allowing hot air to mix with my cold air. Has anyone had this issue and got to the bottom of it? I can hear my Expansion Valve actuating every now and then, and the air will get noticeably colder. I haven't figured out when/why it does that, as I can't seem to replicate it with varying engine RPM.
So what gives? I feel like I'm not low on Freon. Only thing I can think of is the expansion valve not opening properly. However, I've been getting pelted by the rotting vent insulation for years now. I'm wondering if maybe the vent door that mixes how and cold air has deteriorated and is allowing hot air to mix with my cold air. Has anyone had this issue and got to the bottom of it? I can hear my Expansion Valve actuating every now and then, and the air will get noticeably colder. I haven't figured out when/why it does that, as I can't seem to replicate it with varying engine RPM.