Okay, another HVAC issue here. I have searched and searched and while I seem to share some issues with others, they don't exactly seem the same.
When I got my 05 TB in March it had nice cold AC (Manual system). Starting around June as the temps in Florida started to rise and the afternoon storms started jacking up the humidity, the AC started losing its potency. Sometimes it blows cold, sometimes it blows air temp. I can adjust the temp sliders and the system seems to respond, so I don't think it is the blending doors unless they are being blocked. If I shut down the HVAC system completely and drive with the windows open, warm air will vent through. I think I figured this out looking at parts breakdowns of the hvac system (basically, I believe that when shut down, the recirculating door disables opening a passage from the cowl into the vehicle?).
Yesterday, on a whim, I turned on the HVAC and left the fan speed low and the air was colder than it was if I turned it up to 4 (5 doesn't work, so that controller probably needs replacing, I will have to rewatch May03LT's video on this).
At the suggestion of an HVAC guy working on my home system, I got a can of freon with the attached gauge and checked the pressure, it was well within the green "Okay" zone.
The compressor appears to be working, it puts a load on the engine and the front is spinning.
The driver's side is always warmer than the passenger side, but I read somewhere that this is just poor system design, still, sometimes it is a little warmer and sometims it is just plain warm and sometimes it will go from cool to air temp to cool without anything being touched while the passenger side stays constant. This is why I started looking for how the air flowed in the system.
Every time I read about someone else's issue, I check mine for the faulty component and it seems to be working. I plan to do my throttle body cleaning today or tomorrow and upgrading my ground wire to 4 gauge and Ibam hoping when the computer goes through its calibrating process it self-corrects my wierd issues. If it doesn't any suggestions on where to look? Or is it likely I am dealing with multiple issues and that is making it hard to find the problem?
When I got my 05 TB in March it had nice cold AC (Manual system). Starting around June as the temps in Florida started to rise and the afternoon storms started jacking up the humidity, the AC started losing its potency. Sometimes it blows cold, sometimes it blows air temp. I can adjust the temp sliders and the system seems to respond, so I don't think it is the blending doors unless they are being blocked. If I shut down the HVAC system completely and drive with the windows open, warm air will vent through. I think I figured this out looking at parts breakdowns of the hvac system (basically, I believe that when shut down, the recirculating door disables opening a passage from the cowl into the vehicle?).
Yesterday, on a whim, I turned on the HVAC and left the fan speed low and the air was colder than it was if I turned it up to 4 (5 doesn't work, so that controller probably needs replacing, I will have to rewatch May03LT's video on this).
At the suggestion of an HVAC guy working on my home system, I got a can of freon with the attached gauge and checked the pressure, it was well within the green "Okay" zone.
The compressor appears to be working, it puts a load on the engine and the front is spinning.
The driver's side is always warmer than the passenger side, but I read somewhere that this is just poor system design, still, sometimes it is a little warmer and sometims it is just plain warm and sometimes it will go from cool to air temp to cool without anything being touched while the passenger side stays constant. This is why I started looking for how the air flowed in the system.
Every time I read about someone else's issue, I check mine for the faulty component and it seems to be working. I plan to do my throttle body cleaning today or tomorrow and upgrading my ground wire to 4 gauge and Ibam hoping when the computer goes through its calibrating process it self-corrects my wierd issues. If it doesn't any suggestions on where to look? Or is it likely I am dealing with multiple issues and that is making it hard to find the problem?
