MY HEATER IS BLOWING COLD AIR OUT

  • Tiny
  • Anonymous
  • 2006 Pontiac Grand Prix
  • 170,000 miles

My heater is blowing cold air out. The antifreeze is all top up. What do you think is wrong.

Friday, November 23rd, 2012 AT 8:31 PM

4 Answers

  • Tiny
  • Wrenchtech
  • Expert
  • 19,815 posts

With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.

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Friday, November 23rd, 2012 AT 8:48 PM
  • Tiny
  • JDL
  • Expert
  • 16,290 posts

Do the heater hoses get hot? Does the engine reach normal operating temp? Also, temp door under dash may have issues?

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Friday, November 23rd, 2012 AT 8:48 PM
  • Tiny
  • JDL
  • Expert
  • 16,290 posts

Hey wrench, have a good holiday, I didn't see you.

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Friday, November 23rd, 2012 AT 8:49 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,815 posts

No problem. Happy Holidays to you too.

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Friday, November 23rd, 2012 AT 8:49 PM

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