Get the latest advice about your car

Get Started
Advice » Q&A » 2005 Pontiac Sunfire

Q&A

Ask Your Question

2005 Pontiac Sunfire

Question: have a knocking noise under my dash in my heating/ventilation when I turn it on

Question

sabra, Whitefish, MT, January 23, 2012, 20:29
Profile_thumbnail
 Rookie

the noise is at all ventlevels, a/c, defrost

1 Answer
Answer It
Flag This

  • Answer #1

    Loren's Auto Repair (2238 Answers) , Kalispell, MT - (406) 755-7757
    LorensAuto January 23, 2012, 20:48
    Profile_thumbnail
     Enthusiast

    Dose the noise go away after the mode has changed or does it continue all the time? Do all of the modes work normally and it the heat and cold settings as they should be? Can you make it do it any time? You may need to bring it by the shop so we can hear what it wounds like. I am suspecting a broken mode door or something like that.

    Flag This

  • Reply

    sabra, January 23, 2012, 22:00
    Profile_thumbnail
     Rookie

    It continues all the time on all modes. The modes all work, however with the knockng noise. It did it at one point last winter then quit. It started doing again last week with the recent cold spell

    Flag This

  • Reply

    LorensAuto, January 24, 2012, 12:11
    Profile_thumbnail
     Enthusiast

    It has to be a broken part in the heater and the only way to find out is to diagnose it which will probably require taking it apart to find what is broken. Give us a call if you would like us to do this work.

    Reply
    Flag This
Answer Ranks

This week's top 10

1 globalhelper 6 Autohaus Lake Norman
2 milesauto 7 TimGoodreau
3 csubak30 8 Merrimack Auto
4 jose8889 9 Camster
5 obdcar 10 2004toycam