I need some ideas. It's just gotten cold here in Texas, and I've started using the heater. Over the last couple of days, when I put on the heat, the blower came on and blew cold air. The coolant temperature gauge would rise to about 100 C. Then all of the sudden, heat would blow and the coolant temp returns to normal. Today however, even with the temperature set to MAX, cold air only, and the coolant temp went into the red. The coolant level light has not come on, and I had just topped it off not too long ago. I'm not sure what's going on. Any ideas? Thanks!

Don

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Don Drake

1990 300E 125k Miles
1994 S420 100k Miles