So I have a 2016 RAM 2500 that originally came with the 5.0" RA2 radio.

I upgraded through infotainment.com to the 8.4" RA4 and had 0 issues with their OEM dash kit included with the new radio.

Last year I upgraded again to the 8.4" UAS(non-nav) car play radio, and it was working up until it started getting colder.

I started the truck this morning key-in-ignition remote start was not used, and the block heater was plugged in since it was on 7 degrees out this morning and the truck starts right up the lights on the HVAC are blue, and the radio is off(black screen) physical buttons do nothing.

If I turn on the defroster, the little orange light does not come on, but the defroster works.

No, since this isn't the first time this has happened, I checked the Radio 20A in-line fuse behind the passenger battery, and it too is good; I even swapped it out with a new one and tried a 25A fuse too. Pulling the fuse and putting it back in gets the radio going again, and the radio and HVAC control all work again.

I've tried so many things, not plugging in the block heater, using/not using remote start, there is no consistency other than the cold weather here in NY.

Please help; I miss my music early in the morning; I almost got some frostbite trying to pull the fuse again this morning without gloves on, LOL.