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94' Nissan pickup heater vents won't switch

This is a 1994 Nissan XE 4-cyl, 5-spd 2WD. The only vents that produce high air flow from the heater are the ones on the front of the dash that have the pivotal slats.

When switched to defrost, very small, weak air flow comes out of the defroster vents and when switched to split between feet and defrost, very small or no air flow from the floor vents or the defrost vents either.

I took up some slack in the manual wire from the heat lever, door operator cable but has not helped.

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  • laurelfence Feb 03, 2009

    I have a 1986 f-250 pickup, and with the heater on high I can only get air through the vents. When I turn the switch to floor or defrost the air flow still comes out of the vents. I checked the damper and it works accordingly with which setting I have it on but it seems like there is a air flow restriction somewhere else.

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4 Suggested Answers

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SOURCE: 2005 nissan sentra-air stuck on defrostwont switch to floor or ve

vent door is stuck open

Posted on Feb 14, 2009


ourhowse
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SOURCE: stuck on defrost

Check for vacuum lines under the hood that are loose, off, or cracked. With the engine running, wiggle them around and listen for a hissing sound.

Posted on May 22, 2009

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SOURCE: 2008 Nissan Versa - defrost

the deflector flap that move to direct air flow is stuck under the dash.

Posted on Jun 02, 2009

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SOURCE: air/heat will only blow out dash vents,will not

motor linkage cables not moveing ,find heatermotor and move mechs until you get them to blow where you need them

Posted on Dec 24, 2009

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