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check the fuse

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โˆ™ 2009-10-03 22:18:03
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Q: What could cause the AC lighter and heater control panel light to not work on a 1989 Nissan truck?
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A bad control switch can cause your 2003 Nissan Sentra heater blower to stay on. The motor or a bad sensor can also cause the heather not to work properly.

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Birth control can help to make your period lighter, and a tad quicker.

Will a bad heater motor resistor cause your climate control panel not to light up?


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A bad heater core / it needs to be replaced

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the heater core could be pluged or the heater control valve is stuck closed

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Most likely it's the heater control valve. If the heater control valve leaks a little it can allow a small amount of heated engine coolant to circulate through the rear heater core.

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