Question about 2006 GMC Envoy

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Ac blower has no high speed changed resistor, can not find blower motor relay

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The relay is part of the resister, when you replaced he resister did you check the connector and make sure the connector was not melted if it is the you need to replace it.

Posted on May 23, 2011

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I'm going to assume you have the manual control version. The relay in the resistor allows the fan to run on high and bypass the resistor circuits. There is a 40amp blower fuse for high speed and a 30amp fuse for the other speeds. The motor is grounded thru the resistor.
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1995 GMC Sierra fan blower not working.


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If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford :
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

The AC clutch solenoid is not in the fuse panel, not sure what relay is AC. There is a Blower motor relay, but this is only if the blower motor does not work in AC, vent or heat.
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There is also the Blower motor resistor, but this is usually the blower only works on high, the other speeds are not functioning
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Looking up under the glove box
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Heater Fan only works on high speed


Well you need to change the blower motor relay,if it works for awhile and then goes to only on high again change the relay and the blower motor.The relay is usually cheaper than the blower motor and thats why you should change that first.

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AC is stuck on high on my nissan titan 2006. I have heard it may be the resistor or the control panel


The blower resister is near the blower motor,mounted on the outside of the blower box,but actually goes inside the blower box.It~s function actually is to give the blower motor lower speeds.If it is only working on high,then this is the problem.If it works on high when you select a lower speed,then there is a high blower motor relay that is stuck in the closed position .Replace the relay.

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