2000 Buick Century

Tiny
MORTKEY
  • MEMBER
  • 2000 BUICK CENTURY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 40,000 MILES
Just had resistor replaced. Heater motor runs only in high.
Tuesday, December 9th, 2008 AT 8:20 PM

1 Reply

Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
GM also uses a relay in the circuit.
The relay switches one way for the lower speeds that go through the resistors, and then switches the other way for high speed so you have direct battery power.

Could also be the switch in the dash.
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Wednesday, December 10th, 2008 AT 10:05 AM

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