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No heat and engine over heating

MERCURY SABLE
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SWEETVTMOM
  • MEMBER
  • 1 POST
I have a 1999 Mercury Sable, 130,000 miles. Yesterday, our thermostat gage started going hot and then cold and then hot, plus we had cold air blowing out of the heater vents. We changed the thermostat but it didn't do the trick. What else could this possibly be?
Nov 5, 2007 at 1:20 AM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
you hsould bleed the coolant system after you change the thermostat.
Nov 5, 2007 at 11:09 AM
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