Question about 2008 Ford F 250 Super Duty 4WD

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Thumping noise when air is turned on my 2008 f250 6.4

When I turn the air on it makes a thumping noise under the engine compartment. It will thump every now and then while driving and the air is on. When the air is turned off the noise does not happen. What is wrong? Please help!

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: heater makes thumping sound blows out cold air

the motor that works the main heat door is bad

Posted on Feb 01, 2010

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  • 24 Answers

SOURCE: 02 explorer.no heat,makes thumping noise

  The concern lies in the temperature blend door. Most likely if it is clicking the door is broken where the motor shaft (the motor that actuates the door) goes into the door. Replace both the door and motor ( unfortunately from Ford the whole heater box needs to be replaced) or an aftermarket such as Dorman may have the door separate.  The entire dash needs to be removed for the repair so it is quite costly.

Posted on Oct 18, 2008

SOURCE: Ford windstar 2001

Replace the heater actuator switch it is not allowing the door to open, Ours did the same thing so I relaced it . it cost 90.00 from ford

Posted on Nov 02, 2008

  • 1 Answer

SOURCE: 2003 Ford Explorer. A/c blows cold, but not from front of vents

I have the 03 Expy with continuous rear air unit "clicking" or more accurately flapping of the air damper while the plastic gears in the 2L2H-19E616-AA grind away into toothlessness. Ford designed this unit to find the end of travel by jamming the motor to a stop and monitoring the current to determine when to stop applying voltage. That would probably be fine if the gears were designed to handle the jammed torque or the motor did not slip out of groove and continue turning and cracking the plastic gears.

There are two white colored boxes, one is for the temp plenum door, the other the upper/lower air flow. To be sure, do what I did, turn on the ignition, rear ac/heat and listen for the obnoxious click/thump as you move the temp control from full heat to full cool, you will know which part. Disconnect the electrical connector, four bolts and it is out!

Go to your dealer, part should be about $60 or less, look on line, lots of dealers sell for this or less on internet.

Posted on Apr 07, 2009

  • 52 Answers

SOURCE: my car is making a thumping or banging noise when

check the wheel bearings, sway bar link kits, ball joints, and struts. I know that sounds like alot of things in the front end of this car to check but as i worked at ford those are the MOST COMMON issues these cars had that could be related to your issue. the coil springs have a tendency to break often also. that problem is usually all 4 coil springs.

Posted on Aug 05, 2009

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