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Discussion Starter #1
Lately, nearly all the time on start-up I can hear the blower motor running but there's no airflow out of the dash vents. If I reach under the passenger side of the dash and give it a good whack the air starts flowing right away. From time to time, though, the air won't be cool and I have to shut off the ac and turn it back on again and it'll be cool immediately. Is there a known issue of blend door/vent actuators that might be causing this? Possibly a blower motor fan drive issue even though I can hear it running? Any input would be appreciated.
 

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on my '04 pilot the vents would get stuck between modes and wouldn't blow out the middle front vents. I ended up taking the actuators out and apart, and cleaning them. Also cleaned all the cams and followers on the plastic flap door assemblies best I could. Found that some of those plastic door parts were side loading a little and allowing the doors to hang up between settings. Cleaning it all up helped.
 

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If you can change the blower speed settings and it changes accordingly then your blower motor and blower motor transistor are fine. The fins on the blower might need a good cleaning, but as mentioned above your problem is likely the actuators. Other possible issue I recall reading about is a circuit board related to the automatic climate control wearing out and causing abnormal behavior.
 

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Discussion Starter #4
on my '04 pilot the vents would get stuck between modes and wouldn't blow out the middle front vents. I ended up taking the actuators out and apart, and cleaning them. Also cleaned all the cams and followers on the plastic flap door assemblies best I could. Found that some of those plastic door parts were side loading a little and allowing the doors to hang up between settings. Cleaning it all up helped.
Thank you. I'll delve into actuators and related parts.
 

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Discussion Starter #5
If you can change the blower speed settings and it changes accordingly then your blower motor and blower motor transistor are fine. The fins on the blower might need a good cleaning, but as mentioned above your problem is likely the actuators. Other possible issue I recall reading about is a circuit board related to the automatic climate control wearing out and causing abnormal behavior.
Thanks so much for your input.
 
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