Did you recently purchase/lease a Ford Explorer, or are you interested in that vehicle?

A reporter from a national news publication would like to speak with you about your experience; please reach out to PR@Edmunds.com by Wednesday, 4/25 for details.

Heater not working 2000 small block Blazer

johnnyboy1950johnnyboy1950 Member Posts: 11
edited December 2016 in Chevrolet
My heater seems to not be working properly. The temp switch seems to change the temp ok (when engine is hot and sits still for a few minutes, I get some warm air) not sure if function switch is working. It seems to move too freely??? Wondering if there is anyone familiar with this problem or could lead me to look for the cause further!!! Novice but capable mechanic, thanks
Tagged:

Comments

  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    This post is a bit confusing. You say your heater isn't working but then you say you get warm air. So do you get warm but not hot air? Or do you get hot air but only in one function (floor or vent or defrost, etc).
  • johnnyboy1950johnnyboy1950 Member Posts: 11
    Thanks. The warm air is from engine heating the ducts only, not heater and only initially when standing still. I don't think I'm getting anything from heater. I do get a tiny amount of temp. rise when I turn thermostat to warm setting but not real heat. I think this is constant regardless of the vent, heat, defrost setting. Thanks again for the help!!!
  • thecardoc3thecardoc3 Member Posts: 5,878
    Is the blower motor running and do all of the different speeds work?
    Do the controls for the HVAC assembly re-direct the air to the varying output positions? Defrost, Dash, Bi-level, Floor?
  • johnnyboy1950johnnyboy1950 Member Posts: 11
    Blower seems ok....vent control seems to move too freely, but I'm getting air out of all locations and doesn't seem to change much from one to the other. I read there is a hot-cold flow switch in one of the lines. I'm going to try back washing the heater core first. Does this switch need to be removed first. Thanks so much!!!
Sign In or Register to comment.

Helpful Tools

Most popular vehicles

Your Privacy

By accessing this website, you acknowledge that Edmunds and its third party business partners may use cookies, pixels, and similar technologies to collect information about you and your interactions with the website as described in our Privacy Statement, and you agree that your use of the website is subject to our Visitor Agreement.