• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

No Heat

  • Thread starter Thread starter RangerJoe
  • Start date Start date Aug 10, 2010

RangerJoe

I leave the horn on while driving
15 Year Member
Apr 26, 2010
2,560
1,146
184
Georgia
Aug 10, 2010
#1
  • Aug 10, 2010
  • #1
Hey guys,

I currently cannot get heat to blow through my defroster. I drained the coolant, flushed the heater core and flushed the system using a prestone flush. While I was doing the flush (and running the heat to cycle it), i still could not get heat, but I noticed that my ac compressor was running and the ac lines were ice cold. The water lines goinging into the heater core are hot.

I unplugged the ac and then I got heat. Plugged it back up and lost heat. Any suggestions here? I have tried the heat from start up to when the car is idling in traffic at 200*...still no heat. Unplugging the ac is the first time I have felt heat. I can also turn the knob that controls how hot or cold you want the air, I do get some type of response out of this, but it just goes from cold air to luke warm air.

Thanks in advance!

Joe
 

mustangmutt

Member
Aug 2, 2010
339
6
18
El Paso, TX
Aug 10, 2010
#2
  • Aug 10, 2010
  • #2
Open or remove the glove box and look to see if the temp control cable is operating properly. Make sure the cable isn't popped out of its mounting bracket and that it is properly attached to the lever that moves the temp blend door.
 
You must log in or register to reply here.

Similar threads

Engine Bleeding air in the heater core
  • keel
  • Apr 2, 2026
  • Fox 5.0 Mustang Tech
Replies
10
Views
369
Fox 5.0 Mustang Tech Apr 23, 2026
limp
P
I need definitive heater valve and AC expansion valve answers
  • PurAU
  • Sep 26, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
4
Views
239
1965 - 1973 Classic Mustangs -General/Talk- Oct 1, 2026
GypsyR
G
B
A/C Issues
  • Boats90GT
  • Jun 10, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
183
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 11, 2026
Mcmahst
N
Need stainless carb heat shield
  • newmex999
  • Aug 29, 2026
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
2
Views
190
1965 - 1973 Classic Mustangs -General/Talk- Sep 13, 2026
Mcmahst
M
Resolved 1988 Foxbody - Overheating Summer
  • MDrisc
  • Oct 26, 2025
  • Fox 5.0 Mustang Tech
Replies
16
Views
988
Fox 5.0 Mustang Tech Jul 17, 2026
fasterthangas
F
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?