1st 3 Blower speeds not working (HVAC)

KURTTIME

MEMBER
1 POST

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

Mar 2, 2006 at 2:25 PM

FISHERMAN

✓Experienced 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.

Mar 3, 2006 at 1:44 AM

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.

Apr 3, 2006 at 5:55 AM

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Suggested Repair

Check the blower speed switch first for plastic melted into the contacts from heat. If the switch is good, replace the blower motor resistor, often located behind the glovebox in the heater housing; confirm the location with a parts diagram if needed.

Conversation Summary

The owner of a 1999 Nissan Frontier reports that only the highest cab blower speed works and the lower three speeds do not. An expert advised checking the blower switch first because heat can melt plastic into the contacts. Another reply recommended replacing the blower motor resistor, commonly found behind the glovebox in the heater housing.

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1st 3 Blower speeds not working (HVAC)

Suggested Repair

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