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Why does the heater on 1999 Buick Century only work on the high setting?
Wiki User
∙ 13y ago
Either than switch, the resistor, or the relay is bad.
On my 1999 Buick Century, the blower motor quit working on the three lower speeds, and then went out completely. When the resistor goes bad, the lower speeds quit working. My blower motor was squealing, also.
After I replaced the blower motor and the resistor, I tested it and found the blower worked great on every speed but high. It turned out that there is a separate circuit for high speed, and the fuse was blown.
I replaced the fuse for the high speed, and the blower now works on all 5 speeds.
Replacing the blower and resistor was difficult, but not as bad as expected, thanks to help from this site.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
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