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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

No Heat

  • Thread starter Thread starter ian1996silver
  • Start date Start date Nov 17, 2005
I

ian1996silver

New Member
Nov 7, 2005
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Nov 17, 2005
#1
  • Nov 17, 2005
  • #1
My '96 has no heat on any setting. The temp control knob seems to work fine it steps 1 notch at a time, but still no heat. Is this the heater core?
 

mikes2008gt

Founding Member
Sep 29, 2002
706
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17
Arlington, Texas
Nov 17, 2005
#2
  • Nov 17, 2005
  • #2
Stuck thermostat.
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
4,749
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Nov 17, 2005
#3
  • Nov 17, 2005
  • #3
+1 stuck thermostat
 

DropTopPony

Noob Slayer
Founding Member
Aug 13, 2002
2,570
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south jersey
Nov 17, 2005
#4
  • Nov 17, 2005
  • #4
did you swap out your t-stat for a cooler one? say 160?
 
I

ian1996silver

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Nov 7, 2005
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Nov 17, 2005
#5
  • Nov 17, 2005
  • #5
Just bought it a couple of weeks ago. No mods as of yet. if the thermo was stuck it would over heat, YEAH? I guess it could be stuck open, but how does that effect heat inside?
 

mikes2008gt

Founding Member
Sep 29, 2002
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Arlington, Texas
Nov 17, 2005
#6
  • Nov 17, 2005
  • #6
ian1996silver said:
Just bought it a couple of weeks ago. No mods as of yet. if the thermo was stuck it would over heat, YEAH? I guess it could be stuck open, but how does that effect heat inside?
Click to expand...

If your thermostat is stuck open, the coolant/water constantly flows thru the motor and circulates thru the radiator, keeping the coolant/water cool, which means...no heat inside 4 U. When a thermostat is working correctly, once your motor warms up, the thermostat will close, which blocks the coolant from continually circulating thru the radiator and motor. Thus, the coolant heats up from the friction of the motor, which then runs hot coolant/water thru your heater core, which is how you get heat inside your car.

Put a new thermostat in and you'll have heat again.
 

timeless2

Vi Veri Veni Versum Vicus Vici
Admin Dude
Nov 29, 1999
1,366
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154
the Shadow Gallery
Nov 17, 2005
#7
  • Nov 17, 2005
  • #7
Don't know if anyone's mentioned it yet, but you can overheat with a stuck open t-stat as well; the coolant never gets enough time to fully cool in the radiator before passing through the block again.

These are cheap and it never hurts to replace them anyway, with that age on it.
 
S

Sinewave

New Member
May 11, 2004
25
1
1
Kenner, LA
Nov 17, 2005
#8
  • Nov 17, 2005
  • #8
Make sure you replace it with a fail-safe thermostat. A cheaper, fail-closed one can leave you stranded on the side of the road at best and very quickly fry our engine at worst.
 

Orions98GT

New Member
Nov 20, 2004
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Overland Park, KS
Nov 17, 2005
#9
  • Nov 17, 2005
  • #9
definitly thermostat.
 
I

ian1996silver

New Member
Nov 7, 2005
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Nov 17, 2005
#10
  • Nov 17, 2005
  • #10
Definately not the thermo. Replaced with a pretazone 190 fail-safe OE thermo. Still no heat.... Where to now. Got the service CD on order, we'll see what we can do when it gets here?????????
 

Outlaw97GT

Member
Sep 10, 2005
234
0
16
Redneckville, Tx
Nov 17, 2005
#11
  • Nov 17, 2005
  • #11
Check and see if the heatercore has been bypassed. Last owner might have
bypassed it instead of replacing it.

Do our cars have heater control valves?
 
I

ian1996silver

New Member
Nov 7, 2005
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Nov 17, 2005
#12
  • Nov 17, 2005
  • #12
Outlaw97GT said:
Check and see if the heatercore has been bypassed. Last owner might have
bypassed it instead of replacing it.

Do our cars have heater control valves?
Click to expand...



What am I looking for. Im not a ford guy and have never even messed with a heater core. I know it has 2 tubes that are supposed to come out of the fire wall, but where on the gt?
 
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