2002 Chrysler Concorde no heat at low speed

2002 CHRYSLER CONCORDE
140,000 MILES • 6 CYL • 2WD • AUTOMATIC
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MIKE51
  • MEMBER
  • 1 POST
The heat will only work at speeds of 60 or greater. the temp gauge works, with no hot to cold fluctuation. when I run the car at consistant highway speed, the heat woks fine. as soon as I low down to regular stop and go street traffic the heat will cool right down to cold. What could cause this? Could it be a loss of vacuum on the valve?
Dec 2, 2008 at 7:20 PM
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ZACKMAN
  • ✓ASE Certified Mechanic
  • 4,202 POSTS
  • ASE Certified Mechanic
Make sure that your coolant level is where it is supposed to be. Replacing the thermostat also helps. Yours may stick open.
Dec 4, 2008 at 8:05 PM
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