Avalance won't warm up at idle

jmastny

Avalance won't warm up at idle

Unread post by jmastny » Thu Jan 07, 2010 7:53 pm

I just installed a remote car starter in my 2005 Avalanche. When I use the remote start, the truck engine warms up in about 5 minutes or so, but the blower only blows cold air until the RPM's are increased. No matter how long I let the truck idle, it just blows cold air. As soon as I jump in and take off - I get hot air immediately. I even tried bringing the rpm's up while in park, and then I get hot air, but while the truck is at idle....nothing but cold. Any ideas?

Terry

Re: Avalance won't warm up at idle

Unread post by Terry » Thu Jan 07, 2010 8:33 pm

Sounds like the coolant level is low.

Tom

Re: Avalance won't warm up at idle

Unread post by Tom » Wed Oct 18, 2017 10:10 am

If coolant level is good, you have a restricted heater core. Get a flush service done, or do it yourself by removing heater core hoses and run a garden hose through it to blast into it to flush out all the gunk.

Post A Reply

  • Similar Topics
    Replies
    Views
    Last post