I have a 2013 Rubicon Unlimited, and I've been having major heater issues. I've been getting cold air on the left side of the Jeep, and lukewarm air on the right. After a bunch of research, I've heard of either flushing the coolant (which I had done at an oil change shop), or going all out and replacing the heater core. Perhaps a better flush, a reverse flush, is in order. Has anyone had any luck with this, or does it only work for a short time, and then you're back to the drawing board?
The other question is about the block heater: I've never used it until now and the Jeep starts fine without it, but every other vehicle I've owned the heater made a quiet hissing sound. I can't hear anything with the Rubicon (yes I had power to it for sure), which makes me think it's not working. Any insight on that?
Why is it that my new Jeep has all the problems and the '96 and '94 Cherokees are fine?