CS
There aren't any of odd things happening as you mention above. There is one significant odd thing happening that started on the same trip that I noticed the lack of warm air. I have had about 4-5 occurrences of the truck stalling when taking off from a stopped condition at a red light...
I've had my ED for about 15 months now. It has only 48K miles. My heater has stopped working consistently. The unit will provide heat for the first 10 minutes in manual control. If I switch to auto control, it will only blow cold air with temp setting significantly higher than cab temp. If...