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post #1 of 10 Old 01-11-2012, 05:15 AM Thread Starter
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Wierd clunk

I have a 2008 F250 KR and i have started noticing a wierd clunk from the passenger side floorboard area. It occurs about every 30 seconds when I am idling at a stop or at slow speeds. Otherwise, the truck runs strong.

Could this be the 'Blend door" problem?

Really frustrating.
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post #2 of 10 Old 01-11-2012, 10:02 AM
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Quote:
Originally Posted by dbllung View Post
I have a 2008 F250 KR and i have started noticing a wierd clunk from the passenger side floorboard area. It occurs about every 30 seconds when I am idling at a stop or at slow speeds. Otherwise, the truck runs strong.

Could this be the 'Blend door" problem?

Really frustrating.
Blend or door is more of a typewriter noise. If u could be more explicit with your "clunk" noise I might be able to help u out more.


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post #3 of 10 Old 01-11-2012, 10:14 AM
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Mine does the exact same thing. To me it sounds like some one kicking the bottom of the can with a shoe on. I thought it was the blend door also.

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Thanks. I'll give er a good wackin in the morning.
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post #4 of 10 Old 02-17-2012, 08:14 AM
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It has something to do with the A/C compressor. Turn your a/c off and it will stop. I have the same thing going on with mine. Has been doing it for a while so I wouldn't worry about it.
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post #5 of 10 Old 02-17-2012, 08:19 AM
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post #6 of 10 Old 02-17-2012, 11:40 AM
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mine does this also was actually gonna post on it, there is no fix for this? it appears to do it only in defrost


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post #7 of 10 Old 09-23-2012, 05:44 AM
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I noticed the same noise the past few days. It's been cooler out so I've been idling more in the morning, and also idling after I stop until around 300°F egt. I know the ac is off and defrost is definitely on. The sound is not a typewriter noise, it is a clunk that sounds sort of mechanical.... Kinda like train cars coupling together (obviously not that loud though). I can also feels the clunk in my feet, but it definitely is coming from the passenger side floor area.

I will idle without defrost and see what happens.

MT
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post #8 of 10 Old 09-25-2012, 10:11 PM
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Nothing to worry about they all do it on defrost. My 6.0 was even louder when it did it

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post #9 of 10 Old 09-26-2012, 06:09 AM
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Quote:
Originally Posted by srjd View Post
Nothing to worry about they all do it on defrost. My 6.0 was even louder when it did it
I concur, had the defrost and AC off for the past few days and no clunks were heard. It was dewy/foggy here this morning, so the defrost got turned one.....clunks returned.

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post #10 of 10 Old 10-08-2012, 06:57 PM
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Mine don't really clunk but the truck sounds like it misses and then rocks a little bit but only on defrost


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