heater is blowing out cold air

2004 MERCURY SABLE
140,000 MILES
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EVEERS1708
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  • 1 POST
My 2004 Mercury Sable heater is blowing out cold air after a couple of seconds of blowing out warm or hot air. The thermostat warms up and does not over heat. I also do not see a leak spot when I am coming or going. What could the problem be?

-No Leak spots underneath the car
-If on the highway the heat will come on, when in town stopping a lot causes it to cool

Thanks in Advance
Dec 28, 2011 at 12:59 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Check the thermostat and coolant level
Dec 28, 2011 at 1:30 PM
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