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1st 3 Blower speeds not working (HVAC)

Tiny
KURTTIME
  • MEMBER
  • NISSAN FRONTIER
1999 Nissan Frontier XE 4WD extended cab Pickup
98,700 miles

Only the highest speed of my cab heater (blower) is functional. The lower 3 speeds do not work. Is this probably a bad capacitor or a relay of some kind? How do I locate the relay, capacitor, or switch for replacement? How should I attack this problem?

Thank you!

Kurt Turrell
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Thursday, March 2nd, 2006 AT 10:25 PM

2 Replies

Tiny
FISHERMAN
  • MECHANIC
  • 937 POSTS
First check the switch. Some times I found that the plastic melts in to the contacts, because of the load heat.

Start checking that.
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Friday, March 3rd, 2006 AT 9:44 AM
Tiny
KNIGHTRIDERKITT2000
  • MEMBER
  • 93 POSTS
Try replacing your blower motor resistor, I have a subaru that had the same problem, bought one from a junk yard for $2.50 because they are around 50.00 for my car. That solved the problem.
Check behind glovebox in heater housing if not there go to www. Autozone. Com they have a link to tell you where it is.
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Monday, April 3rd, 2006 AT 12:55 PM

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