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HVAC noise
With the temps starting to dip I'm using the defrost more often. Last night I noticed a popping from the passenger side dash every 30 - 60 seconds whether moving or sitting still, but only when the defrost was selected, either straight defrost or feet/defrost. Sounds like a valve in the duct closing, anyone else with the same noise? Thought I'd check first, I hate hearing the "it's normal" from my tech.
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2003 350 Lariat FX4 Short Box 6.0L *SOLD*
2008 FX4 F350 6.4L Dually Long Box, Black on Black PICTURES
2007 Keystone Raptor 3712TS PICTURES
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