1986 Nissan Maxima heat comes on all the time

1986 NISSAN MAXIMA
200,000 MILES • 6 CYL • 2WD • AUTOMATIC
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PINGKAIC
  • MEMBER
  • 7 POSTS
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
Dec 9, 2009 at 4:30 AM
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BLUELIGHTNIN6
  • ✓Experienced Mechanic
  • 16,542 POSTS
check blower motor relay, if OK check the heater control switches.
Dec 9, 2009 at 6:42 AM
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PINGKAIC
  • MEMBER
  • 7 POSTS
where is the blower motor relay on my 1986 Maxima
3 liter/6 cylinder
Dec 9, 2009 at 7:35 AM
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BLUELIGHTNIN6
  • ✓Experienced Mechanic
  • 16,542 POSTS
on the left rear corner of engine compartment, should be blue in color.
Dec 9, 2009 at 8:42 AM
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