heater box cables on an 80's Defender 90 - Defender Source
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  #1  
Old August 21st, 2011, 06:07 PM
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heater box cables on an 80's Defender 90

Does anyone have a good summary of what the cables do that go into the heater box of a 90? I understand that one is the hot/cold temp mixer, but what is the other one? The cable I am referring to is connected to the laughable fan speed controller (the one with three speed settings - on, maybe on, and off)
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  #2  
Old August 21st, 2011, 06:17 PM
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Jeff Payne
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I think that in addition to controlling the speed, when it is all the way up it will fully close the door so that in the event of a water crossing no water will get in there. At least that's what I was told.
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Old August 22nd, 2011, 01:16 AM
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Mike Hammond
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Quote:
Originally Posted by sonoronos View Post
Does anyone have a good summary of what the cables do that go into the heater box of a 90? I understand that one is the hot/cold temp mixer, but what is the other one? The cable I am referring to is connected to the laughable fan speed controller (the one with three speed settings - on, maybe on, and off)
May be on never seemed to work when I had it and I can't for the life of me remember where the cable went or what it was attached to and I'm 1/3 of a world from home at the moment but back in Blighty on Thursday, I'll try and look then.
The one next to the temp control directs the air to the screen the foot wells or both.
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Old August 22nd, 2011, 03:54 AM
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The forst post here :

http://forums.lr4x4.com/index.php?sh...9&#entry323899

has a good guide to adjusting the cables.
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Old August 22nd, 2011, 11:04 AM
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John B.
1991 Defender 90, 200TDI
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Yes, it closes off the air going in. It has two important uses...

1) When water crossing over the bonnet....

2) Shut in the summer as the design of the heater always lets some heat through, even on the cold setting.
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Old August 22nd, 2011, 11:24 AM
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Thank you, guys!
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