27 people reported this problem
Knocking sound next to third row seat. on Ford Expedition
Knocking sound in the back of the car when the a/c or heat is on. Replaced the rear ac blower damper motor. = $40.00
2005 Ford Expedition 145,000 mi, Visitor
Last winter my car was cold, when I turned the rear heat on, it began thumping loudly. Has done it ever since...
knocking sound by the third row
2015 Ford Expedition 22,000 mi, Visitor
When I turn on air for back of expedition, loud knocking noise starts.
2005 Ford Expedition 150,000 mi, Visitor
Knocking when in rear third row ac unit when heat is turned on
2003 Ford Expedition 80,000 mi, Visitor
Replaced rear ac mix door actuator
2004 Ford Expedition 190,000 mi, Visitor
Knocking sound heard behind middle passenger seat. Second row only not blowing hot or cold
2003 Ford Expedition 150,000 mi, Visitor
Same issue with the knocking noise and never had it fixed. It only does it when I blow warm or cool air to the middle and back rows...
2007 Ford Expedition 87,000 mi, Visitor
Knocking sound on right side rear by the third row and cargo area when I turn it on
KNOCKING SOUND WHEN HEAT WAS ON IN BACK VEHICLE BLOWER
Thumping sound from around rear seat area. Only when heat/air in back is on. Have not fixed.
2003 Ford Expedition 60,000 mi, Visitor
Heater damper bad second time
2003 Ford Expedition 110,000 mi, Visitor
I have had this same problem with the blend door and the Floor/ Ceiling door.
2004 Ford Expedition 123,000 mi, Visitor
Same problem never fixed