No heat

Yes, as you probably know, several things can be on one ground, so if one thing goes bad out of that group it will mostlikely effect the others, I would also take a look at the body control module, it may have a burnt connection, as I have experienced so many times, if you havent checked all of the fuses do so and get back to me.
Thanx

DTC 24 Blend door short or failure-You gonna have to go visit the dealership this is a very complicated issue, involving numerous pinpoint tests-

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Cheers, Ken