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re: Heater in truck only warms air when accelerating?

Posted on 11/2/22 at 4:41 pm to
Posted by LanierSpots
Sarasota, Florida
Member since Sep 2010
69712 posts
Posted on 11/2/22 at 4:41 pm to
My Tahoe did that and it was the resistor on the heater fan.
Posted by holmesbr
Baton Rouge, La.
Member since Feb 2012
3905 posts
Posted on 11/2/22 at 8:59 pm to
The is a forum on the internet for Ford trucks. It was pretty good when I had my Expedition. Just info, no BS like a Honda message board.
Posted by baldona
Florida
Member since Feb 2016
23407 posts
Posted on 11/3/22 at 11:11 am to
I wouldn't think it would be a blend door as those usually fail closed, or if it failed open it would work all the time.

Sounds like either low on fluid as said or an electrical issue that's only working when at higher rpms.
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