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The purpose if the humidity sensor is so the compressor doesn't run continuously in manual mode. Without the sensor the compressor runs continuously whenever the system is on in either manual or automatic no matter what selection you have it set at. With the sensor the compressor runs continuously in auto which is the way it's designed to work but doesn't run when in manual mode unless needed and doesn't come on at all when set on vent.
I think I misunderstood. I was thinking of manual vs auto as being the settings in the bcm and your talking about disengaging the auto selection with the switch on the fan speed button or radio screen.
You are correct. Our trucks both had the correct wiring. Our Sun Sensor connectors had 4 wires but our original Sun Sensors were only utilizing two of those wires. We were able to buy the correct 4 pin Sun Sensors that came in the factory ATC equipped trucks. We were able to get rid of the Sun Sensor error code after installing the new Sun Sensor. My truck is a 14 Express 1500 4X4 and his is a 15 Tradesman.
Rick did it make any difference in the operation of the ATC?
No, not that I noticed. Possibly the only thing that may have changed is that the A/C seemed to blow harder when the sun was glaring on the window but it may have just been me over thinking it. I didn't notice anything substantial about the operation changing. The DTC codes for the Sun Sensor did go away though.
It gives you Automatic control of the HVAC system in the truck. It will speed up/slow down the fan, change where the air comes out, and turn of the heat/AC just by what temperature is set. You doi have to worry about forgetting to set the heat, defrost or AC, the system will do that for you when you start the vehicle, especially handy when remote starting.
It also fixes a manual temperature control glitch that occurs when upgrading from the 5 inch radio to the 8.4 inch radio.
I put in a pioneer stereo and haven’t had any issues with it.
So will it work with manual controls? I took out the stock radio and put in a pioneer stereo and still have manual hvac controls
You need the 7 speed fan but what might cause a problem is the aftermarket radio. Some of them don't recognize single zone ATC as it was not a factory option.
Yes I still have those.
There is much more to making a Single Zone ATC bezel than just swapping the knobs/button assy around. You have to modify the control board.
