2019 Freightliner Cascadia optimized idle weirdness

I'll keep it quick and straight to the point, I'm running a 2019 Freighlinter Cascadia and on optimized idle with interior comfort mode it's switching between full cold on the air conditioning and what seems to be full heat and with it being mid 80's in Utah it switching between the two is getting very frustrating. How do I correct this?

 

I have 2020 truck and the thermostat in the sleeper controls the temperature. That's also were the sensor is. The front of truck gets hot during the day time if you interior comfortable mode is on. Because the sun is shining in. I have the 8 battery electric a/c in the sleeper and I can close the sleeper curtains and run the electric a/c and it will keep sleeper cool. If not the engine will start then and run the truck a/c. My only suggestion would be turn the temperature down even more in sleeper and that should make the engine start more.

 

The problem is the dial for the temp is all the way to the cold and it doesn't respond when I adjust it when it does blow hot

 

If your truck has the coolant heater valves. You can close them and it should stop the coolant. If it's the front dash blowing hot air. You can reset the blend door. The blend door open and closes to mix hot and cold air. Maybe that's the problem. It still the same way on the newer trucks I believe.

 

I didn't notice if it was the front vents as well that were blowing hot, as for the coolant valves I'm going to assume that this truck doesn't have them since I haven't seen them and idk what they would look like. I'll try the reset though and see if that fixes it

 

Here they are on my 2020 truck with DD13 passenger side by back of engine kinda. I think they are optional from factory. If you don't have them you could try turning the power to cab off for 10 minutes and maybe it will rest the computers. If it a computer problem. The power cut of switch on the floor. Those are all the idea I know of.

 

Battery disconnect would be between the door and the driver seat if my truck had one, correct? I think I may have got screwed with Swift and have gotten a truck without a disconnect

 

Yup I never seen the new Freightliner without one but maybe they can order then without one. Have you try running engine and sleep a/c manually just to see if you get any cold air. Maybe the whole a/c system is not working or the sleeper one is not working. Make sure the yellow Park light is on. So the sleeper temperature knob is controling the temperature.

 

It blows cold when I idle the truck, the way this truck is set up is that the rear controls override the dash controls for the fan and the temp. The ####in geniuses at Swift decided that it'd be a good idea to order it without the disconnect and yet the also want to get on me for idle times when the other option when I'm home is to let the batteries go dead, it's ####in amazing that me as a 23 year old newbie driver could set up the fleet better than they can. Ffs at very least fix the simple #### like putting in place a better system for trailer dispatch and monitoring than what you've got now...

 

Yeah that's how it works the sleeper controls the fan and temperature when optimized idle is on and it's on Interior Comfort Mode and the Park light is turned on. Maybe someone else might have another idea. It suck when it hot and no a/c in sleeper