03 Trailblazer high fan becoming intermittent.

Works most of the time. Has a mind of its own too. No pattern of twisting the knob back and forth makes it work when it's acting up, it just does when it decides to. The other three positions are ok. Anything I should check besides the switch?

Reply to
Meat Plow
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Look for a "blower relay", it only comes on at high blower speed.

Reply to
ScottM

Hit the trailblazer forums.

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Reply to
topprolmc

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