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EL Interior heater 

 

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 Post subject: EL Interior heater
Posted: Sun Apr 09, 2006 6:07 pm 
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CAn anyone please give me some hints on why my interior heater seems to not get hot
I thought they were controlled by water temp or am I wrong

 

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Posted: Sun Apr 09, 2006 6:33 pm 
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GLi, Fairmont?
whats it doing?
and it is controlled by water.

 

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 Post subject: Re: EL Interior heater
Posted: Sun Apr 09, 2006 9:25 pm 
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ironworker wrote:
CAn anyone please give me some hints on why my interior heater seems to not get hot
I thought they were controlled by water temp or am I wrong


They are heated by water temp.

If its not getting Hot then:
Engine running too cold - wrong thermostat?
Heater core blocked - Flush or replace heater core.
Heater tap inoperative - replace heater tap.

 

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Posted: Sun Apr 09, 2006 9:42 pm 
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vacuum valve for heater tap not operating (or vacuum leak)
Blend motor not working or hasn't been calibrated.

 

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 Post subject: Re Interior Heater
Posted: Mon Apr 10, 2006 12:05 am 
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Krytox wrote:
GLi, Fairmont?
whats it doing?
and it is controlled by water.

GLi wagon
it blows air with just a hint of warmth whatever the water temp
The engine seems to run at normal operating tems (According to the guage anyway)

 

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 Post subject: Re Interior heater
Posted: Mon Apr 10, 2006 12:09 am 
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Cool (no pun intended) I will check those things out and let you know how it went

 

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Posted: Mon Apr 10, 2006 9:50 pm 
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Krytox wrote:
vacuum valve for heater tap not operating (or vacuum leak)
Blend motor not working or hasn't been calibrated.


A vacuum leak at the heater tap would leave it fully open. It only requires vacuum to close it, ie cooling.

 

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Posted: Wed Apr 12, 2006 3:38 pm 
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I have a similar problem with my EL Fairmont Ghia (with climate control). When I turn the temp up high it only blows out cold air. I am pretty sure the demisters are screwing around too. This would be related wouldn't it?
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Posted: Wed Apr 12, 2006 8:20 pm 
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What exactly do you mean?
Quote:
the demisters are screwing around

 

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Posted: Thu Apr 13, 2006 1:06 am 
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Sorry I am only 17... What I meant was that the rear demisters don't work, but this is probably a different problem altogether. I am sure the heater doesn't work though and don't know the cause. I am currently seeking advice on the net cos my Dad and I would rather fix it ourselves than pay the price to get it done... There are a lot of things that can go wrong in Fairmont Ghias... :(
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Posted: Thu Apr 13, 2006 12:26 pm 
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Jace_C88 wrote:
Sorry I am only 17... What I meant was that the rear demisters don't work, but this is probably a different problem altogether. I am sure the heater doesn't work though and don't know the cause. I am currently seeking advice on the net cos my Dad and I would rather fix it ourselves than pay the price to get it done... There are a lot of things that can go wrong in Fairmont Ghias... :(


Ok, the rear demister is a seperate unit to the front heater and windscreen demister. The rear demister is a electrically heated element inside the rear screen with a seperate circuit and fuse. So definately a differant problem. First check the fuse.

If the front heater isn't working at all. Check the heater tap. That is a vacuum operated tap located on a heater hose under the intake manifold. If this blocks up it will prevent hot water from getting into the heater.
Secondly perform the Climate control diagnostics as described in the technical document, http://www.fordmods.com/phpBB2/documents.php?doc=9 After doing this even if no errors are found the diagnostics will recalibrate the blend door position.
Thirdly the heater core may be blocked. You can try and flush it out yourselfs by connecting a garden hose to one of the heater hoses and letting it flush out until the water runs clean. If this fails you may need to replace the heater core - this is a dash out job!

 

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Posted: Thu Apr 13, 2006 12:33 pm 
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my bet is the tap it is a common failure and cheap and easy to replace.
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Posted: Thu Apr 13, 2006 1:26 pm 
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Thanks for the help guys I will take a look at the things you said with my Dad.
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