HEATER BLOWS NOTHING BUT COLD AIR I TRIED ...

  • Tiny
  • Anonymous
  • 2003 Honda Civic
  • 75,000 miles

Heater blows nothing but cold air, I tried changing fuses

Monday, November 12th, 2012 AT 5:15 PM

2 Answers

  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

Check the air mix actuator.

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Monday, November 12th, 2012 AT 5:22 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,840 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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Monday, November 12th, 2012 AT 5:22 PM

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