Question about 1999 Chevrolet Silverado 1500

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1995 Chevy k1500 heater problems.

My heater will only blow air on the floor, it will not defrost , it does the same with the air. What could be the problem and how do I fix it ?

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  • 7 more comments 
  • ccn7 Dec 17, 2008

    thank you for the information I wil give it a try and see what happens.

  • ccn7 Dec 18, 2008

    no good bought new actuator 43.00 bucks still does same thing.must be the switch.

  • ccn7 Dec 18, 2008

    also when i took the actuator motor off i can move the linkage back and forth from floor to defrost with no problem. i test lighted the wires there are only 3 a brown a white and black but only the brown is hot when the key is on. when itested the other to wires i got nothing i am gessing one or the other is ground and the other is theone that sends a signal from the switch to move the electric motor to the setting you want. i hope someone out there can help me.

  • ccn7 Dec 19, 2008

    No , it still blows on the floor it does not re-direct. I am going to put in new controls to see if that will fix the situation.

  • ccn7 Dec 22, 2008

    as to your comment dec. 19 i made a mistake it does re-direct to defrost when i move it by hand. in fact i got it set that way right now for defrost.i got a set of controls on order and should be here in about a week.

  • ccn7 Dec 30, 2008

    my heater problem is fix. new controls and rister and heater blend door actuator. now i got heat every where i want at the tuch of a switch. thanks to all that helped me with my heating problem. ccn7.

  • ccn7 Jan 11, 2009

    sorry i took so long to rate your solution. thanks for your help. regards ccn7. OLD SCHOOL.

  • lehi_starr Mar 15, 2009

    I have a 1995 2500 with no deflost from the windsheild, everyone is telling me it is a vacume hose behind the control panel. when I look behind the control panel there was no vac hose? could it be a control panel problem?

  • Annette Asmus Aug 22, 2012

    Had same heater, defrost problem it was the little motor down right of gas pedal took it apart oiled gears cleaned contacts works now thanks



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There is an electric motor that moves the linkage to change where the air comes out..its under the dash to the right of the gas pedal........the problem is likely the linkages form that motor to your blend door that directs the air.its called the Heater Blend Door Actuator
hope this helps.......Good Luck!

1995 Chevy k1500 heater problems. - moz-screenshot.jpgmoz-screenshot-1.jpg

Posted on Dec 14, 2008

  • 1 more comment 
  • s60six Dec 19, 2008

    If you have the truck warmed up and move that linkage.does the hot air re-direct to the defrost?

  • s60six Dec 23, 2008

    good stuff i hope that will solve the problem........glad to see you found a quick fix as well
    thanks for keeping me posted.

  • s60six Jan 11, 2009

    glad to see you got it fixed...........always glad to help!



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