2015 Equinox blower stuck on high speed - TerrainForum.net: GMC Terrain Forum
 
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post #1 of 5 (permalink) Old 11-04-2019, 02:42 PM Thread Starter
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2015 Equinox blower stuck on high speed

Blower motor runs constantly on high speed. When turning the fan speed switch the fan icon in the display shows different speeds but the motor stays on high. Is there a relay that could be stuck only for high speed?
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post #2 of 5 (permalink) Old 11-04-2019, 03:43 PM
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Probably the blower motor resistor. A very easy swap, and a $30-$40 part.

This video shows how to replace it. The resistor is replaced starting at the 0:54 mark.
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post #3 of 5 (permalink) Old 11-04-2019, 04:31 PM
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Blower motor runs constantly on high speed. When turning the fan speed switch the fan icon in the display shows different speeds but the motor stays on high. Is there a relay that could be stuck only for high speed?



Good video above shows it all .. . Yay!

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post #4 of 5 (permalink) Old 11-04-2019, 04:35 PM Thread Starter
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I can understand why the resistor would keep it from running on lower speeds but why would it make the blower run on high regardless of the speed switch setting?
post #5 of 5 (permalink) Old 11-04-2019, 05:19 PM
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I can understand why the resistor would keep it from running on lower speeds but why would it make the blower run on high regardless of the speed switch setting?
The Blower Motor Control Module (resistor) through a PWM Circuit, varies the voltage to the blower from 2 volts to 13 volts.
There is more than just this module involved.
As cheap and easy this module is to change, it is a good first step.

If this doesn't work we will have to dig deeper.

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