I think I'm having a similar issue as you all seem to be having. High speed fan kicks in I watch the temp rise. When the high speed fan stops the temprature decreases. Is this the sams as you are all experiencing?

1999 Silver Frost Contour SVT 2690 of 2760 Born 08/13/1999 Sony Mobile ES CDX-C90 Deck 6 1/2 Infinity Kappa Perfect mid & tweet set, 2 12 Infinity Kappa Perfects JBL P.600.1 for Bass, P.180.2 for front stage.