When I bought my truck it was already 10 years old plus it had an aftermarket stereo installed. It was warm season when I bought the truck so I didn’t discover the minor flaw that it has until Spring. The stereo overheats plus shuts off if the air conditioner is not running. The air conditioner vents run on either side of the stereo plus they kept it cool plus running well all warm season long. During the warm season months, I never drove the truck separate from the air conditioner running as well. When fall came, I turned off the air conditioner plus drove with the windows open plus the stereo shut off. When I evaluated it, it felt honestly tepid to the touch. I turned the air conditioner back on, waited awhile, plus the stereo worked again. Since then, I have discovered that running just the vent on low is also satisfactory to keep the stereo cool, and running the oil furnace in the truck is not. So if I want to open the window, I need to make sure that I keep the vent air going too. If I want to run the heater, I can’t use the stereo. This is all honestly annoying but I don’t want to take the dash apart to update the stereo. It just reminds myself and others of PC rooms that are kept extra cool, with strong air conditioner, so that PCs don’t shut down in office buildings. Except, this isn’t an office, this is a truck. Oh well, I believe that’s what you get when you buy an older used vehicle: there is consistently some glitch of some kind.