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Ford
Expedition
32

Knocking sound next to third row seat. on Ford Expedition

Problem Data
Average mileage: 118,795 (22,000–223,000)
5 model years affected: 2003, 2004, 2005, 2007, more2015
32 people reported this problem
Comments
Viewing 1 - 15 of 15 comments
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
Last winter my car was cold, when I turned the rear heat on, it began thumping loudly. Has done it ever since...
Knocking sound on right side rear by the third row and cargo area when I turn it on
knocking sound by the third row
Replaced rear ac mix door actuator
When I turn on air for back of expedition, loud knocking noise starts.
Knocking sound heard behind middle passenger seat. Second row only not blowing hot or cold
Knocking when in rear third row ac unit when heat is turned on
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...
Crank up and a knocking sound from passenger rear at 3rd row power controls. Knocks/clicks about 5 times then stops.
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.
Heater damper bad second time
I have had this same problem with the blend door and the Floor/ Ceiling door.
Same problem never fixed