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No De-Mist - Mondeo Mk1


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13 replies to this topic

#11 siruncle

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Posted 23 February 2014 - 10:31 PM

unfortunately, being as yours is LHD i'd imagine access to the "silver thing" as described above is going to be harder than just pulling the glovebox out, (as yours is on the wrong side) you may be able to get at it by removing the lower centre console trim (remove the little plastic covers to find the screws)

 

are you getting nothing at all, or very little air to the windscreen? if its a little, the silver thing might be blocked, there is some how-to's in this part of the mk1/2 mondeo forum, click "search" first and you can change where you "search" to "this forum" and use "vacuum" as your search word, and you'll only get results from this forum. :L


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#12 nigelrrb

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Posted 24 February 2014 - 06:42 PM

I had this with my 97 Mk2, no aircon. I found that the silver vacuum actuator for the screen demister flap has 3 positions: no vacuum = demist flap fully open, 1st stage vacuum (small pipe in the middle of the unit) = demist flap half-closed, 2nd stage vacuum (pipe on the end of the unit) = demist flap fully closed. There is a spring inside the unit that pushes the demist flap open when there is no vacuum, and in my case the spring was weak and it couldn't overcome the resistance of the flap and the rods. I think also the demist flap and rods had got stiff over time making it more difficult for the spring to push the flap open. I fitted a new actuator and gave the flap a good workout by hand, and so far it's solved the problem. It was a pig of a job to do on a RHD car, there was just about enough room to get a 1/4 drive ratchet in to move the nuts 1 click at a time.



#13 malmeida14

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Posted 24 February 2014 - 07:09 PM

Thank you for your quick replies. Today I tested again and some times work well, most of the times it blocks in to the windscreen, or only to footwell , or other position. Reading nigelrrb answer i think if the lack of use would be responsible for the stiff clasp and rods. Usually I only use in the windscreen position. My door handle of the left rear door is stiff needing some oil because of the lack of use (don't forget - left hand drive).

Well, I will try to see if changing the position frequently I can free the system, if not, by your answers it's a job for my mechanic.

Thanks again.



#14 malmeida14

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Posted 15 March 2014 - 02:55 PM

From my last post to today, whenever I use de car I have been changing positions and fan speeds. Finally is working fine in every positions and fan speed. Thanks nigelrrb for the tip.






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