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Why will the heater in a 1996 Grand Am with 4 pos heater switch not work on HIGH but it works in all 3 other positions?
Wiki User
∙ 19y ago
Your heater switch may not need to be replaced. The heater high position is controlled by a fuse under the hood. Until you find the fuse and replace it, your new switch will not work. JRR.
Wiki User
∙ 19y ago
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The heater blower switch and the electrical plug attached to it may be at fault. Remove the heater control unit from the dash and inspect the plastic electrical plug attached to the blower switch, you may see it has melted. The switch and plug is available from your local auto parts store.
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For most GM trucks or SUV's, it's under/behind the glove box. But the most GM motors do not have multiple speed capacity. That is usually a function of the switch. Many of the GM multi speed vehicles use the heater function switch assembly to control motor speed. Unfortunately, many of them are "solid state" and require that the entire heater function switch be replaced when something goes bad.
What if your rabbit is licking the heater?
What heater? heater in your house? heater in your water bowl? There is probably salt and/or other minerals on the heater that he is licking off.
