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Welcome, I'm Chris (aka Moose), my normal schedule online is around lunch and after dinner past midnight.
Are you saying the rear blower speed gets stuck on high setting?
Since it is now working fine, you will not be able to diagnose it to see what is causing this issue. Normally when you have an intermittent issue like this it comes out to the be the climate control module that is to blame.
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Hello again Chris here,
Thanks for rating my response.