Climate Control Issues With UAQ

[Ryanh19]

Hello,

I seem to be having trouble with my climate controls after upgrading to a UAQ in my 2013 1500. When adjusting the temperature, the radio does not accurately display what is coming from the vents. For example, it will show full hot, but cool air will still be coming out of the vents. I need to press the heat button about 5-10 more times to actually get to heat. Another thing that may be notable is that the radio displays the outside temp in celsius with no option to change units in the settings where it should be.

After reading the following posts about similar issues it seems like the common fix has been upgrading to ATC which I have just completed following the M2 Mods harness and instructions on here with alfa OBD. Change to Dual Zone ATC, wait for radio reset, then Single Zone ATC.

How To: Install a 2018 4C (UAQ/UAS) Radio in 2013 - 2017 RAM

For the 2018 model year RAMS, the 8.4 Radios were changed from the previous VP3/VP4 Harman radios to the 4C/4C-Nav radios made by Panasonic. The biggest advantage of these new 4C Radios is the support for Apple CarPlay and Android Auto. The radios themselves fit the same mount as 2013-2017...

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HVAC problem with UAS upgrade in '18 truck

I have an '18 Tradesman 2500 diesel on which I've upgraded the radio from RA1 to RA2 to RA4. I've also upgraded to the single zone push button HVAC with 7 speed blower, all using harnesses from M2 Mods. I ran the RA4 for a bit and am now trying out an '18 UAS (non-nav). I really like most of the...

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I now have Single Zone ATC configured for my truck and the issue still persists. I made sure to pull the inline fuse between changes to reset the radio. The climate controls seem to work properly and display the outside temp in fahrenheit until the full configuration is set on the radio. I will link a video showing what is currently happening along with other relevant information.

Video of issue

2013 Ram 1500 Hemi
Original RA3 Single Zone MTC 7 speed
Upgraded UAQ part number: 68306656AR
Current HVAC config: Single Zone ATC
UAQ Application Version: 39.6.0




I have been looking through many threads but I cannot seem to find an answer to this. Any help would be appreciated.

Thank you,

Ryan

 

[Cool_Hand_Luke]

Hi
I’m having pretty much same issue. 2013 150 Big Horn with 2018 Panasonic nav radio. Also my temp is stuck in F and I’m using all metric!
Have you solved it?

 

[crash68]

I’m having pretty much same issue. 2013 150 Big Horn with 2018 Panasonic nav radio.

If you have the 8 spd transmission there is a 3-way valve that directs coolant to the transmission TMU when heat is not needed for the cab. It's possible that valve isn't working and not throwing a code.

 

[Cool_Hand_Luke]

I don’t follow. My issue is that temp display is stuck in Fahrenheit and miles in nav. My temp setting jumps to HI after 74 degrees. How does the radio affect the transmission cooling? Everything was working with stock 2013 radio

 

[crash68]

For example, it will show full hot, but cool air will still be coming out of the vents.

How does the radio affect the transmission cooling?

The coolant is directed to the transmission TMU if it is not needed for heat in the cab. If the 3-way isn't working properly there will be a lack of heat in the cab.
Your lack of heat could also be a blend door.

 

[04fxdwgi]

The coolant is directed to the transmission TMU if it is not needed for heat in the cab. If the 3-way isn't working properly there will be a lack of heat in the cab.
Your lack of heat could also be a blend door.

Or a coolant system pressure cap not holding pressure.