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Old 05-17-2010, 05:28 PM   #1
panelguy
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Heater selector switch

Hello all,
The heater selector switch wont change the position of the air flow, it is blowing on defrost and doesn't matter the switch position.
The switch was a bit stiff for awhile now it moves freely, obviously something has let go.
My question is would the problem be with the cabling or electric. Have you had this problem ?
My car is a 2000 Focus wagon.
Thanks


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Old 05-18-2010, 01:47 AM   #2
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Posted via FF Mobile Mechanical from your description, now you need to look at it to see just what let go, avoids buying parts by guess...
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Old 07-12-2010, 06:29 PM   #3
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On further investigation I see there is no cabling hooked on to the heater position switch , just wires running down to blend doors next to the gas pedal.
The fact that there was a lot of resistance when moving the knob and now it moves freely makes me think the switch itself is broke.
Does this sound logical to you?
Thanks.
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Old 07-12-2010, 10:22 PM   #4
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Posted via FF Mobile If the knob moves and the wires (cables) don`t, either the knob is spinning on the shaft or the shaft isn`t moving the mechanism properly. (yeah, it`s broke!)
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Old 07-15-2010, 06:44 AM   #5
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Quote:
Originally Posted by panelguy View Post
On further investigation I see there is no cabling hooked on to the heater position switch , just wires running down to blend doors next to the gas pedal.
The fact that there was a lot of resistance when moving the knob and now it moves freely makes me think the switch itself is broke.
Does this sound logical to you?
Thanks.
Are you saying there are no mechanical connections to the switch? I thought the position switch had a metal cable attached to it which operated the flap.


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Old 07-15-2010, 07:19 AM   #6
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Are you saying there are no mechanical connections to the switch? I thought the position switch had a metal cable attached to it which operated the flap.
No, it controls electric motors that actuate the vent and the temperature blend door. It is possible that the switch went out. I haven't looked at this myself, but if you can figure out how to test the leads going to each motor for resistance then that will tell you if the motors are not good, and by process of elimination you can assume that the switch is most likely bad.
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Old 07-15-2010, 08:12 AM   #7
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I did not think it was mechanical from his description, but was confusedby the fact it went stiff and then let go and was loose. This is usually what happens to the mechanical controls. Being electrical then switch replacement would seem the obvious move. Sorry for confusing things.
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Old 07-15-2010, 08:38 AM   #8
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when my switch went out it actually melted its self and so you couldn't turn it...until i tried harder and it broke. I would just pull it out and visually inspect it. Especially in an '00.
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Old 08-01-2010, 12:47 PM   #9
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Thanks for your answers.
I changed the switch which does have cables leading to the blend door.
It work fine for a couple of weeks then broke again.
I can freely move the blend door by hand and can change the air movement position by hand.
I'm not sure whats next but at $60.00 for the switch I won't change it again until I find the problem.
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Old 08-01-2010, 01:30 PM   #10
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Sounds as though the cables are not routed correctly, putting a strain on the mechanism. Did you lubricate all moving parts on reassembly? Did you use a new switch and cables?
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