Cold air blowing from heater vents

Tiny
OUTLANDERPADDY
  • MEMBER
  • 1999 MERCURY SABLE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 11,500 MILES
I've had the coolant checked and a check run on the system that showed the thermostat was not the problem. The car engine heats up properly, but the blower only blows cold no matter the temperature setting. I was advised to take it to a Ford dealer to further check the problem. Any suggestions/ideas before I go that route?
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Sunday, November 23rd, 2008 AT 12:22 PM

26 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If its not a defective thermostat-could be one of the following -air mix/blend/mode doors and a vacuum/actuators-HVAC control module

This guide can help

https://www.2carpros.com/articles/car-heater-not-working

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Sunday, November 23rd, 2008 AT 12:46 PM
Tiny
OUTLANDERPADDY
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Thanks for getting back to me
You mentioned a diagnostic price, does the price range vary depending on the problem or the repair shop? Any idea what the average repair cost might be?
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Sunday, November 23rd, 2008 AT 6:46 PM
Tiny
RASMATAZ
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Honestly Sir-it really depends what needs to be repaired and also the labor cost varies with location-the best thing is to shop around-could be just as simple vacuum hose disconnected or a binding door its hard to say-they have to go behind the dash to get at it.
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Sunday, November 23rd, 2008 AT 6:56 PM
Tiny
OUTLANDERPADDY
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  • 3 POSTS
I would like to give a good feedback for a fast, easily understandable reply, but can't figure out your feedback point system?
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Sunday, November 23rd, 2008 AT 7:38 PM
Tiny
RASMATAZ
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To give your feedback contact the webmaster@2carpros. Com or click on the button of the main page contact us-Thank You and have a nice day
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Sunday, November 23rd, 2008 AT 7:43 PM
Tiny
DWAYEN
  • MEMBER
  • 1 POST
  • 1999 MERCURY SABLE
Heater problem
1999 Mercury Sable Front Wheel Drive Automatic 170000 miles

I have no heat in my car, I have a new water pump, thermostat, heater coil, head qasket changed and still no heat, is there a switch or panel, shutter that needs to be open, and is there something I can do myself
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Wednesday, November 13th, 2019 AT 5:18 PM (Merged)
Tiny
RENAUDTN
  • MECHANIC
  • 636 POSTS
Here are a few suggestions:

-make sure your level of coolant is good, and the system bled for air.
-The blend door actuator may be out.
-The blend door may be broken.

When you turn the switch from cold to heat, do you hear the blend door moving inside the panel?

Here, check this website, it'll give you an idea of what could be your problem:

heatertreater. Net/Mercury%20Sable%2096-07. Htm
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Wednesday, November 13th, 2019 AT 5:18 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
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Great suggestions
Also we find it
Very common for the heater core to be clogged and need to be flushed
Isolate and flush heater core
Need to know how let me know
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Wednesday, November 13th, 2019 AT 5:18 PM (Merged)
Tiny
BRAVESTAR1
  • MECHANIC
  • 234 POSTS
It is quite likely that the heater core is clogged. It generally gets full of debris that doesn't settle in the radiator.

Drain the system, and have a qualified repair technician remove the heater core. It is located inside the car under the dash, and can be cumbersome to remove. Make sure they put plenty of towels down to absorb radiator fluid as this stuff reeks and is difficult to remove from carpet.

Flushing out the heater core manually, assures free flow of water, reinstall then check for leaks. Refill with the proper 60/40 mix of antifreeze to "distilled" water, and leave the radiator cap or expansion tank cover off, while you run the engine to purge the system of air. Once the engine reaches an optimal temperature of 180 degrees, close the cover, and check for heat.

If the car doesn't have heat at this time, then either you were sold a defective thermostat or the heater door isn't opening up properly. In which case the vaccuum lines may be broken.
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Wednesday, November 13th, 2019 AT 5:18 PM (Merged)
Tiny
RONT12
  • MEMBER
  • 6 POSTS
  • 1999 MERCURY SABLE
Heater problem
1999 Mercury Sable 6 cyl Front Wheel Drive Automatic 65.000 miles

i just changed the thermostat and coolant and my heater gets warm but not hot, it is full of coolant. What do I do next?
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Wednesday, November 13th, 2019 AT 5:18 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi:
It sounds like the heater core may be plugged. Feel both heater core hoses to see if they are both hot with the engine running and the heater on.

Let me know what you find.

Joe
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Wednesday, November 13th, 2019 AT 5:18 PM (Merged)
Tiny
RONT12
  • MEMBER
  • 6 POSTS
Thanks, I will try that.
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Wednesday, November 13th, 2019 AT 5:18 PM (Merged)
Tiny
DOVEANGEL1980
  • MEMBER
  • 1 POST
  • 1999 MERCURY SABLE
  • 176,000 MILES
I am a single mom of 3 and have to fix this myself so please explain if it is thermostat where would it be and how to fix or what else could be the problem heat worked just fine last year
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Wednesday, November 13th, 2019 AT 5:18 PM (Merged)
Tiny
BONNIEBLUE
  • MEMBER
  • 2 POSTS
  • 1999 MERCURY SABLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 90,000 MILES
Changed thermostats 3 times blew out heater core knob just goes round and round but have great air cond.
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Wednesday, November 13th, 2019 AT 5:19 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
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If the knob going round and round
have to start by checking the knob and switch 1st
check heater hoses if both hot
problem is on the inside

good luck
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Wednesday, November 13th, 2019 AT 5:19 PM (Merged)
Tiny
JIMIJDT
  • MEMBER
  • 1 POST
  • 1999 MERCURY SABLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 96,580 MILES
My 1999 sable is not putting out very much heat. At +25 degree's it can barely defrost the windshield, I put a new 195 degree thermostat in yesterday and that didn't help. I flushed the cooling system out a couple of times and even reverse flushed the heater core a couple of times. Do you think the heater core might need to be changed. Jim D
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Wednesday, November 13th, 2019 AT 5:19 PM (Merged)
Tiny
RACEFAN966
  • MECHANIC
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Sounds like the heater blend door actuator dorman part number 604-206. Otherwise something is blocking the door itself. Let me know what you find.
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Wednesday, November 13th, 2019 AT 5:19 PM (Merged)
Tiny
NATALIEANNROSEN
  • MEMBER
  • 2 POSTS
  • 1999 MERCURY SABLE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 100,000 MILES
This is a response: The car(1999 Mercury Sable) engine gauge has not changed in speed to warm up or how warm it indicates. Cabin is receiving very little heat.
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Wednesday, November 13th, 2019 AT 5:19 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the thermostat and the heater core if its clogged-start here
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Wednesday, November 13th, 2019 AT 5:19 PM (Merged)
Tiny
NATALIEANNROSEN
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Thanks so much. Appreciate your help.
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Wednesday, November 13th, 2019 AT 5:19 PM (Merged)

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