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post #1 of 11 (permalink) Old 04-17-07, 01:28 PM Thread Starter
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99 Taurus heater core

I noticed the heat output from my heating system is not really hot. On a cold day if I run the fan at maximum, the heater output changes from warm to cool. At slower fan speeds the output remains warm.

Obviously the heater core seems plugged although I have not put an infared thermometer on it. Question--- has anyone changed a heater core on a 99 Taurus? For those who may have done so, how big a job did you find the task? Wifey had an old Lincoln and the dash board had to get removed to get at the heater core.

Anyway, before I get that far into this project, I am going to first try flushing the core with something----- draino maybe???

All comments and suggestions welcomed--

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post #2 of 11 (permalink) Old 04-17-07, 04:16 PM
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cool Re: 99 Taurus heater core

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Originally Posted by foggysail
I noticed the heat output from my heating system is not really hot. On a cold day if I run the fan at maximum, the heater output changes from warm to cool. At slower fan speeds the output remains warm.

Obviously the heater core seems plugged although I have not put an infared thermometer on it. Question--- has anyone changed a heater core on a 99 Taurus? For those who may have done so, how big a job did you find the task? Wifey had an old Lincoln and the dash board had to get removed to get at the heater core.

Anyway, before I get that far into this project, I am going to first try flushing the core with something----- draino maybe???

All comments and suggestions welcomed--
You have to pull the dash, but not the box. After removing the dash, you remove the temp. blend door actuator, remove the spring, below the cover is the secondary door lever. Depress the locking ramp in the center of it and pull the lever off. Remove the metal link from the primary door lever, then remove the heater core access cover. Rotate the primary lever upward so the heater core clears. Don't forget the heater hoses!!! Just push on the tubes so it comes out.
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post #3 of 11 (permalink) Old 04-17-07, 05:11 PM Thread Starter
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Re: 99 Taurus heater core

WOW, that seems like a lot of work! No, I don't mean your instructions entail a lot of work, it is removing the dash that appears to be be big job.

Is there any hope of just trying to flush the old core out?

How many hours does it take a skilled mechanic like yourself to change one out...........including the dash?
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post #4 of 11 (permalink) Old 04-17-07, 05:38 PM
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cool Re: 99 Taurus heater core

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Originally Posted by foggysail
WOW, that seems like a lot of work! No, I don't mean your instructions entail a lot of work, it is removing the dash that appears to be be big job.

Is there any hope of just trying to flush the old core out?

How many hours does it take a skilled mechanic like yourself to change one out...........including the dash?
Takes 3-4 Hours total. All depends on if you have a full console or not. If you do, you have to take that out first. Aftermarket remote start or alarm wiring can get in the way too.
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post #5 of 11 (permalink) Old 04-18-07, 05:58 AM Thread Starter
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Re: 99 Taurus heater core

My first try is going to be with flushing. I find it incomprehensible automakers make replacing a maintenance item so difficult.
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post #6 of 11 (permalink) Old 04-18-07, 09:28 AM
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Exclamation Re: 99 Taurus heater core

Quote:
Originally Posted by foggysail
My first try is going to be with flushing. I find it incomprehensible automakers make replacing a maintenance item so difficult.
Well a heater core is not considered a maintenance item.
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post #7 of 11 (permalink) Old 04-23-07, 05:04 AM
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Re: 99 Taurus heater core

I have the same problem, flushing only gets me so far. I have also had the core replaced. does anyone have how to on taking out the dash on a 97 Taurus? i'm thinking I will do it my self this time. thanks.
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post #8 of 11 (permalink) Old 05-01-07, 06:16 PM Thread Starter
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Re: 99 Taurus heater core

The other day I tried teh A/C which did not work. Needs freon I think. But what I am getting at is after playing with the controls to get cold air, I could not get HOT air afterwards.

Tried cycling the temperature control back and forth, finally got hot air. The message-------- the problem might be the vent door is not opening all the way or at all allowing air to pass over the heater core. Later I will measure the control and clean it with some electronic cleaner.

I did measure the water temperature in the heater lines. I did not see much temperature drop between the input line and the return line. I do not believe my heater core is bad. For temperature measurements I used an infrared temperature device.

Foggy
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post #9 of 11 (permalink) Old 05-01-07, 06:59 PM
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cool Re: 99 Taurus heater core

You could have a bad temp. blend door actuator.

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post #10 of 11 (permalink) Old 05-02-07, 01:25 PM Thread Starter
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Re: 99 Taurus heater core

Tbird--

Is it the door or the control? Heck, it really doesn't matter, I need to fix it what ever it is.

How difficult is the door to get to?

Thanks-

Foggy
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