scottonfire

The a/c in my ride runs cool and the sweet spot is b/w 3 and 4 on the dial. BUT after around 2 hours it gets ****ty so on an 8 hour trip I find myself blasting it all the way, and it's still cold- but it's not blowing that fast- it's still cold though, but it's the equivalent to maybe 1 on the dial. What gives?

mrobinso

My first guess is that your HVAC control panel (the rectangular black panel with the knobs for AC fan speed and temp) is on the fritz. Likely due to regular use finally wearing it out. You can find used units on eBay for around $50. Not saying that is definitely your problem but if the knobs are responsive some of the time it would lend me to that conclusion.

efzauner

Thats too bad... my 2005 AC is still going strong.. cooler even then my 2011 R!

Shadow5501

Sounds to me like your evaporator is freezing up. Can you hear the fan running but little or no air is coming out the vents? If so that's because the avaporator is covered in ice, blocking the airflow. It shouldn't do this, but it's an easy fix. Just hit the ac button to turn off the compressor. Leave the hvac system running in vent mode. As the ice melts the airflow will increase and warm up. Then you can switch the ac back on and be good for another two hours.

There are a couple of things that can cause the evaporate to freeze over so can't diagnose it here. But it's a common symptom of being a little bit low on refrigerant.

shan

Is your a/c set on AUTO mode?
The fan speed will slow down once the desired temp is reached.
That is what mine does.
If I want the normal set speed of the a/c, I have to off the Auto.
Shan.

scottonfire

Dude! That could def. be the problemo and solution. I'll test it out in a week when I gotta drive 4 hrs. to savannah.