H2 Hummer AC / Heat only work on full max speed settings.

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Feb 4, 2016 | 05:51 PM

Nisa Ali

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Joined: Feb 2016

Posts: 1

H2 Hummer AC / Heat only work on full max speed settings.

If we I place it on any other setting it doesn't work at all. Does any one know or have any idea what is going on?

Feb 9, 2016 | 10:30 PM

yrkdmaxh2

Senior Member

Joined: Feb 2016

Posts: 172

You need a new blower motor resistor.

It is what sends the motor a voltage less than 12-14v when you have it set to less than the max setting.

So when they go bad you loose all the other fans speeds except max.

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