Hvac - Mustang Evolution

Go Back   Mustang Evolution > 1979-Current Mustang GT || Tech and Talk > 1979-1995 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 06-12-2018, 08:01 PM   #1
Registered User
Newbie
 
havhammer's Avatar
 
Join Date: Oct 2011
Region: Michigan
Posts: 143
Hvac

Has anyone had this problem and solved it, if so what was the issue?
So when my heat or ac is off in the car it always has warm "air" coming out of the floor vents. I've had this problem with my last couple foxbodys. When i had the dash out to do the heater core, i vacuum checked all the vacuum "solenoids" behind the dash to see if they hold vacuum. They did, what else could be the issue? The temp control knob works, it changes from hot to cold. Any ideas? Thank in advance.

Sent from my SM-G965U using Mustang Evolution mobile app
havhammer is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-13-2018, 01:03 AM   #2
Registered User
Newbie
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 8,231
It's possible that the foam that is used to seal the blend doors as they change position has deteriorated over the last 24+ years, and there is hot air leaking from the heater core compartment of the HVAC box even when the temperature control is in the full cold position.
When you replaced the heater core, did you confirm that the blend door was indeed closing completely, and making a good seal?
straybullitt is offline   Reply With Quote
Old 06-13-2018, 05:53 AM   #3
Registered User
Newbie
 
havhammer's Avatar
 
Join Date: Oct 2011
Region: Michigan
Posts: 143
Good idea! I dont remember. Lol i think i may have checked the door to see if it was moving but may not have checked the seal. Thanks

Sent from my SM-G965U using Mustang Evolution mobile app
havhammer is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-13-2018, 06:33 AM   #4
Registered User
Newbie
 
jkeaton's Avatar
 
Join Date: Jun 2016
Location: North Carolina
Region: Other
Posts: 1,862
There is always some amount of "fresh air" flowing through the car even with the HVAC system off. Generally the fresh air is admitted through the cowl area and it will be warm if the outside temps are warm. Having the HVAC "off" does not mean that outside air is completely cut off from entering the vehicle....you would die from oxygen starvation in very short order if it did...
jkeaton is offline   Reply With Quote
Old 06-13-2018, 07:44 AM   #5
Registered User
Newbie
 
havhammer's Avatar
 
Join Date: Oct 2011
Region: Michigan
Posts: 143
Thanks i understand there should be some airflow but this is "a stiff breeze" on my ankles and it doesnt seem to be ambient temperature.

Sent from my SM-G965U using Mustang Evolution mobile app
havhammer is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-Current Mustang GT || Tech and Talk > 1979-1995 Mustang GT

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
HVAC Controls move tjvaughn Pre-2005 V6 Mustang 0 07-09-2011 10:35 PM
I've managed to lose the thread -Changing hvac and speedometer color... Black_Sunshine Pre-2005 V6 Mustang 0 07-15-2010 11:05 PM
HVAC Fan Settings OsirisGuy 1996-2004 Mustang GT 18 12-15-2009 10:07 PM
HVAC fan control issue jimmy_beaner 1996-2004 Mustang GT 1 01-24-2009 12:20 PM
Replacing lights in the HVAC controls.. MonteCitan Pre-2005 V6 Mustang 3 09-27-2004 10:08 PM

» Premium Vendor
» Like Us On Facebook



03:31 AM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.