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1986 Nissan Maxima heat comes on all the time

Tiny
PINGKAIC
  • MEMBER
  • 1986 NISSAN MAXIMA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Full heat comes on all the time even with the control turn to lowest. I checked the vaccum hose, and it is OK. I had that happened before but it was the vaccum hose being loose. After plugging in the vaccum hose, the problem was solved.

Is that a electrical problem? The fan works
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Wednesday, December 9th, 2009 AT 12:30 PM

3 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Check blower motor relay, if OK check the heater control switches.
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Wednesday, December 9th, 2009 AT 2:42 PM
Tiny
PINGKAIC
  • MEMBER
  • 7 POSTS
Where is the blower motor relay on my 1986 Maxima
3 liter/6 cylinder
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Wednesday, December 9th, 2009 AT 3:35 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
On the left rear corner of engine compartment, should be blue in color.
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Wednesday, December 9th, 2009 AT 4:42 PM

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