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Why does the lower three heater speeds on a 1999 Malibu not work?
Hookshot
The blower motor resistor is defective. They go bad when the blower motor pulls to much amperage.
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∙ 15y ago
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Why wont the heater in my 1999 alero work at all?
A common problem is that the heater resistor/ circuit board is defective and need to be replaced. The main symptom is that the heater fan with not run on the three low speeds but will run on high.
You only have three speeds out of five on your heater motor where could the problem be?
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Why does the three lower speeds on the heater not work and it smell like something is burning 2000 dodge stratus?
MSN Autos reported the blower motor problem as a resistor failure on the blower motor. In plain English, this means that the resistor on the fan motor which tells it to slow down to a lower speed than "max" is burnt out and no longer completes the circuit. If your heater is on & the fan isn't blowing, it's like a toaster in your dash, with no toast in it. It'll just smell like burning. Apparently it's a cheap fix. The resistor just has to be replaced.
Why does the heater on 1999 Buick Century only work on the high setting?
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.
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On a 1989 buick century sedan 3.3 l You get three speeds on the heater fan when you turn the fan to high there is nothing you already replaced the fan switch any suggestions?
Replace the heater resistor located in the fan housing. Remoe fan for easier access and it is in the left side of the housing. You might want to check for coolant leaks from the heater core that can short out the resistor, especially if the replacement fails after a short period. replace the hi blower fan relay
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