My 9000 Griffen Edition, thermometer showed -2 degrees F below zero here in N.E. Mountains of Pennsylvania at 8 a.m. this morning. The backyard temp. was 10 below. A week ago the Saab temp. shower -6 while I was driving. Nice to have all of the neat equipment working! I did loose the heat for a long while a week ago until I figured out it was the Programing. After reprograming several times the arm heat control moved and allowed hot water to enter the heating coil I assume. The back yard Temp. on that morning was 16 below. Seems like below Zero the car looses the program. I program it my pressing the Auto and the Arrows Button at the same time and after abt. 30 seconds release them and the Auto program takes over. Anyway interestering, Bob