The pano sunroof makes it super hot inside and it is hard to cool down. I have one and never had one previously. I figured out they were hot while checking out the trucks mid day while waiting for my truck to come in, I jumped in on and felt the heat from the roof. Anyway, I started off tiniting the ft windows with ceramic only 50 percent and it helped some, then after a few more weeks I ended up doing the sunroof the same. It made a huge difference. I hated the heat and was thinking I don’t know how I can live with this truck and it’s only a month old. I’m good with it now.
Things I found out about the A/C in this truck vs the previous is that on Auto it won’t turn on the recirculation mode on its own, it will be warm when it’s really hot outside. The previous gens wouldn’t turn the light on, but if you pushed the recirc button say when it was on 65 or whatever temp it set at you wouldn’t notice a difference in sound etc. on the 19 you can set the temp on auto and whatever temp you want and then push recirc and it changes to recirc. This helps a lot with the vent temp. The old truck did this for you trying to maintain your set temp. Then the blower speed would change depending on what is needed to maintain set temp. What people are hearing with the blower speed is the blower going super high speed, it goes faster on auto then on manual settings or Max A/C. The thing moves a lot of air on auto when it’s very hot outside.
The faster the blower speed the higher the vent temp will be due to more air being blown over the evaporator it dissipates the cold air quicker so it is warmer. Think of it as a fan blowing over an ice cube If you put it on max when it’s screaming on auto you will notice it slows down the blower or if you have it on auto and push the high blower speed it slows down too, but it won’t be on recirc either way unless you select Recirc. You need to have recirc on to get the best performance. Occasionally I switch it off for a bit to get some fresh air in. At idle your temps will rise some due to compressor speed most testing is done at 1500 rpm so when at idle of say 700 rpm it will not be as cold. All cars pretty much are this way coldest temp is always going to be above idle.
Bottom line is the pano Roof is hot and the A/ C actually works fine as designed, but the heat from the top is so great when it’s say above 85 that it’s going to not feel cool inside for a long time.
You need to crack a window or slider when first getting in to vent the hot air out. If you use auto push recirc too, although I think Max A/C is the best for the coldest air. Once cooled down the system works. The new refrigerant R1234YF sucks in my opinion vs R134 but you can’t change that. I work on Honda cars and we have the same complaints as here on our new cars mainly the minivans and pilots with big cabs. They come in 4-5 a day complaining that their AC doesn’t blow as cold as it should. They all blow 45-50 when it’s hot out, the heat saturation inside takes a long time to overcome.
It’s been around 100 every day here since I bought my truck and I have tried to figure out the best setup to get it cool since day 1. I’m Ok with the way it is now.
