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Cold Feet

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Old Nov 10, 2014 | 06:02 PM
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Cold Feet

The cold snap we have been having the past few days has moved my heater up on the list of priorities. Everything works fine except that when I move the heater lever to "Floor" it comes out the defroster. Everything else is perfectly normal.

Where should I start? I searched but to no avail.
 
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Old Nov 10, 2014 | 06:21 PM
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What year truck? Does it have ac?
 
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Old Nov 10, 2014 | 06:42 PM
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you have a vacuum leak. defrost is default setting when the controls get no vacuum.
 
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Old Nov 10, 2014 | 06:52 PM
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I agree with Tom..

For reference:
 
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Old Nov 11, 2014 | 08:43 AM
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Originally Posted by bashby
What year truck? Does it have ac?
1990 w/ A/C

Originally Posted by tjc transport
you have a vacuum leak. defrost is default setting when the controls get no vacuum.
Even though the Vent position works?
 
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Old Nov 11, 2014 | 01:49 PM
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Found this.


I took the radio out and the heater controls loose. The defroster/floor actuator is moving. There is a plastic piece on the end that used to attach the actuator to the door. It must have broke.

Has anyone had this happen before? How big of a job is it to fix it? I think I might just go buy some wool socks.
 
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Old Nov 12, 2014 | 09:51 AM
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Originally Posted by 1972RedNeck
The defroster/floor actuator is moving. There is a plastic piece on the end that used to attach the actuator to the door. It must have broke.

Has anyone had this happen before? How big of a job is it to fix it? I think I might just go buy some wool socks.
Any Ideas on what I have to do to fix it? Does the whole heater box drop down or do I have to pull the dash apart?
 
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Old Nov 12, 2014 | 04:17 PM
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You can get into the heater box by removing the glove box, you will then see the rear cover of the heater box which come off with a few screws.
 
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Old Dec 27, 2014 | 12:37 PM
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Originally Posted by Conanski
You can get into the heater box by removing the glove box, you will then see the rear cover of the heater box which come off with a few screws.
The actuator and flapper is closer to the drivers side. How do I pull the flap out to put a new one in? Is the flapper even a serviceable part (can I get a new one)?
 
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