This is my first winter with my Pacifica Touring L and my climate control is acting very strangely. When the cabin is heating up, the heat coming from the vents is blisteringly hot. When the cabin warms up, the heat seems to abruptly stop and cold air emanates from the vents. It gets so cold, that I have to increase the temperature to get some heat to come out again, and then it comes out too hot again. This happens both in Auto and in Defrost mode. Back in the day (before electronic controls), one would moderate the temperature coming out of the vents by turning down the heat slightly when the cabin warmed up... not off completely! It seems to be a flaw in the programming .... anyone have any ideas?
What temperature do you have it set for? Are driver and passenger temps the same or similar? Is the van cabin really cold when the heater is started?
I don't know if this will help, but until you are able to get an appointment to get it checked, you can try some of these things:
Turn the heat all the way up (I think it goes to 82 or 84) on manual and then back down to normal (maybe 76) for heat. You should be able to use the up and down arrows to change the temperature to the degree you desire. It seems like I have the temperature set at 76 for heat in winter to normally blow warm air. It probably depends on the outside temperature and cabin temperature when you start the van.
Try the different modes for air vents by using the touchscreen under the climate app or pushing the manual climate button that is also used to increase fan speed.
If you turn the Auto button off by pressing it and don't press the defrost button on, then I think you will have manual heat.
I asked the dealer about my heater problem when I took it in for another concern, but when I got the van back the paper said something different than I thought I had explained and that the heater/ac were considered to be operating as they should. The other concern was taken care of and my heating issue isn't extreme, so I will try again later to get the auto heat working better.
I still think that something isn't quite right with the heating system in my van, but I have concluded the following:
Auto heat directs the air to my feet and doesn't seem to really give me what I want for heating so I usually manually adjust the heat.
If I want my hands warmed up at the steering wheel, then I put the heat on upper and lower vents since I don't have a heated steering wheel.
I adjust the temperature and fan speed manually as needed.
Sorry that I probably didn't help much. I agree that the programming can use some work. Maybe some others can offer some help.