Originally Posted by someguyfromMD

Unless you live in Gnome, Alaska, I'd bet the problem is elsewhere. The aux pumps are notorious for dying in place, and you never really notice it unless you're in a seriously cold place. Mine was dead for over 4 years on the TE and we always had heat. My 1980 300D had crappy heat, but that was because I had crud in the heater core that I was never able to flush out. The aux pump on that car never worked the whole time I owned the car, so I know that wasn't the problem.

HTH,

someguyfromMD