heater blower only works on hi

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01-10-2007, 07:45 PM

emmanuel

Thread Starter

Join Date: Jan 2007

Posts: 1

heater blower only works on hi

my 2001 silverado heater blower only works on hi speed anyone know whats up? thanks

01-11-2007, 10:28 PM

gijacob

Join Date: Jan 2007

Posts: 3

RE: heater blower only works on hi

It all depends, some vehicles have different relays for each speed on the blower motor that could be burnt up or I would probably think your blower motor itself is bad, just the lower speeds cooked in the motor.

09-06-2007, 11:06 AM

Streakn

Join Date: Sep 2007

Posts: 28

RE: heater blower only works on hi

could be the switch, the motor, or a bad vaccum, which could be the line itself or the unit.

09-06-2007, 04:58 PM

Argon

Senior Member

Join Date: Feb 2007

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Posts: 2,167

RE: heater blower only works on hi

The motor is good...

the blower resistor slows down the current for lower speeds...its bad (most lkely),or the switch itself...beware of the resistor plug being crispy from heat