Recently I've noticed radio interfearance originating from the standard heater temperature control. It is most noticeable when listening to relatively weak AM stations. It is most apparent when the Explorer is cold and the control fully clockwise. The whinning interfearance can be "tuned" out by moving the temp knob a bit but may drift back. It occurs regardless of the other heater control positions.
Has any one else noticed this and chased down a solution? Is a schematic of the "solid state" mixing door control available?
The truck is a 99 Explorer Sport with a 4L SOHC . The heater has the standard 3 knob controls not the ETAC option.
******************************************************************************* Steve Finberg W1GSL snipped-for-privacy@mit.edu PO Box 397082 MIT Br Cambridge MA 02139-7082 617 258 3754 *******************************************************************************