Can a faulty NSS cause the blower not to come on? This morning I went to start my 420sel, and it would only start in neutral. This hasn't happened in a year, and last time it was a bushing on the shift linkage. After the car started, the CCU starting clicking a few times and then didn't do it again. I drove the car until 80C, then I tried to fire up the heater. Nothing. Eventually I could feel heat at the vents, but nothing blew out, and it was seemingly blowing on low at the windshield vents. After freezing for 15 miles, I stopped at a gas station. When I went to start it up, it started in park and the heater worked again as normal. I don't know if its a CCU problem, or a NSS problem.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual