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Climate control

Tiny
BRADLEY E. HODGES
  • MEMBER
  • 2006 NISSAN SENTRA
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
The vent direction control, and blower speed control no longer do anything. The buttons still work with the LED signals and physical defrost turning on and off. The temperature knob still seems to function. When it is set to pull air from outside, it will have very low air movement from the vents, at the set temperature.
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Tuesday, October 24th, 2017 AT 9:47 AM

23 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
The air distribution vend doors seem to be the issue. I can't recall on the 06 for sure, but I believe they are vacuum operated. Check to see if there are any vacuum leaks under the dash. If you're lucky, you may actually hear a hissing sound when the engine is running.
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Thursday, October 26th, 2017 AT 5:57 PM
Tiny
DMARIN
  • MEMBER
  • 1 POST
  • 2006 NISSAN SENTRA
  • 2.4L
  • 2WD
  • MANUAL
  • 125,000 MILES
I have a type R spec V nissan air vent only blows out the defrost yhis happened just after having my cabin air filter replaced, mechanic says its a coincidence and that it is REALLY expensive to fix. It blows cold or hot just fine just only through the defrost vent
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
I believe the vent doors are vacuum actuated. Make sure none of the hoses were left off when the work was done.
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
CAJUNGIRL
  • MEMBER
  • 2 POSTS
  • 2002 NISSAN SENTRA
  • 4 CYL
  • FWD
  • AUTOMATIC
I cannot get the windshield defroster to engage when the directional switch is changed. The other settings such as floor only, front only, floor/front are all working.

Can you tell me how to check this and how to fix it.

Also, do you have a diagram?
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Check the mode door control linkage adjustment.

CONTROL LINKAGE ADJUSTMENT
Mode Door Control Linkage

†Turn mode door control knob to position.
†Set side link in DEF mode.
†Pull on outer cable in direction of arrow and then clamp it.
†After positioning mode door control cable, check that it operates properly.
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
CAJUNGIRL
  • MEMBER
  • 2 POSTS
Where at is this diagram. Can you give me more info on how to get to this cable with instructions and/or diagram please?
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If you look underdash, you would notice the second diagram as indicated.
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
HCHAMI11
  • MEMBER
  • 2 POSTS
  • 2005 NISSAN SENTRA
  • 160,000 MILES
I have a Nissan Sentra 2005 and the control knob for the ac/heat is stuck blowing air out the front. I cannot switch it to defrost the windshield.
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Knob is stuck or it can move but the air flow is stuck on one position?
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
HCHAMI11
  • MEMBER
  • 2 POSTS
It can move but the air flow is stuck on one position.

It's blowing air out the front and I can turn the knob but it won't change which way the air is blowing. This is only really a problem when trying to defrost my windshield when it's cold outside as I've been having to drive with the windows down.
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Check the intake door motor and linkage adjustment.
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
TWRIGHT872
  • MEMBER
  • 5 POSTS
  • 2001 NISSAN SENTRA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 179,000 MILES
Heat goes from cold to hot and it only works when I have it on high, same as defrost
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Do you mean the blower only works on high with erratic heating?
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
TWRIGHT872
  • MEMBER
  • 5 POSTS
Yes only gets heat when you press the gas pedal
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Check coolant level and thermostat for a start.
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
TWRIGHT872
  • MEMBER
  • 5 POSTS
Coolant levels are good, thermastat might need changed.
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
When thermostats are stuck in partially open position, the problem would occur as the engine is running cooler than specifications and coolant flow to heater core is disrupted.
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
JAY1PIZZA
  • MEMBER
  • 2 POSTS
  • 1993 NISSAN SENTRA
Hi, I had fan switch replaced in climate control
and mechanic got the vents crossed up and
now there is no air coming from the face vents
only the defrost.I have driven the car for 2 months
like this and one day got into my car and noticed
there was water on my passenger side floor mat
and egde of carpet was sorta wet. Has my heater
core been affected from my climate control
blocked vents or is this not related? Thanks
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
JAY
  • MEMBER
  • 8 POSTS
More than likely the water is coming from your radiator you will have to replace this
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)
Tiny
TWRIGHT872
  • MEMBER
  • 5 POSTS
We replaced thermastat and replaced radiator and still no heat, one hose is hot and the other hose is cold
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Wednesday, November 1st, 2017 AT 8:16 PM (Merged)

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