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I have a 2007 Ford C-Max 1800 cc Style.

I'm having a problem with the information display.

For the last 3 years at the sign of the first below zero temperature (it seems!) the information display has blanked out. Last year, when we had lots of snow, it started with no display when starting out but it gradually came on whilst driving. A few weeks later it didn't display at all but kept flickering very fast through all of the displays. A couple of weeks later my son suggested disconnecting the battery then reconnecting. That worked! The display came on nice and clear and stayed functional for about a week. Then it just displayed 2 numbers and 2 letters (below the numbers) on the left hand side of the display. I don't know whether it is relevant but it did seem to 'go off' when the weather changed to rain or snow - but that might be co-incidence.

Later when I went out in the car and we had very cold wet snow, the display then clearly displayed SLM 42863 (which was the mileage in reverse 36824 MLS). It could not be reset nor changed.

Later when the weather warmed up it just came back! The information had moved along whilst it was not displayed so no mileage etc was lost. It just seemed to be the display itself which had mis-performed. Then throughout the remainder of the year (March 2013 to February 2014) it was back to normal. A couple of weeks ago when we had our first heavy frost it went off again and has been blank since. I presume that it will right itself again as it did in the last two years.

I have searched everywhere for an answer. The local Ford garage could only suggest replacing the whole instrument cluster at a cost of a few hundreds of pounds! But if it comes back again of its own accord ....

Can anyone help please?
 

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Just a thought and a 'NO COST' check to dismiss the possibility.
LCD's don't like cold weather and or low battery voltage. Batteries really drop their output voltage when they get cold, so although you may show 12-13½v when warm you can lose a big chunk of that when the temperature drops overnight in cold conditions. Next time the weather is cold, load the battery with headlights, heated screens then check voltage output from battery either with multimeter or on the dashboard test routine. As I say a no cost check and I've learned to never dismiss the obvious checks first.
Hope that may help.
'D'
 

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I have a 2007 Ford C-Max 1800 cc Style.

I'm having a problem with the information display.

For the last 3 years at the sign of the first below zero temperature (it seems!) the information display has blanked out. Last year, when we had lots of snow, it started with no display when starting out but it gradually came on whilst driving. A few weeks later it didn't display at all but kept flickering very fast through all of the displays. A couple of weeks later my son suggested disconnecting the battery then reconnecting. That worked! The display came on nice and clear and stayed functional for about a week. Then it just displayed 2 numbers and 2 letters (below the numbers) on the left hand side of the display. I don't know whether it is relevant but it did seem to 'go off' when the weather changed to rain or snow - but that might be co-incidence.

Later when I went out in the car and we had very cold wet snow, the display then clearly displayed SLM 42863 (which was the mileage in reverse 36824 MLS). It could not be reset nor changed.

Later when the weather warmed up it just came back! The information had moved along whilst it was not displayed so no mileage etc was lost. It just seemed to be the display itself which had mis-performed. Then throughout the remainder of the year (March 2013 to February 2014) it was back to normal. A couple of weeks ago when we had our first heavy frost it went off again and has been blank since. I presume that it will right itself again as it did in the last two years.

I have searched everywhere for an answer. The local Ford garage could only suggest replacing the whole instrument cluster at a cost of a few hundreds of pounds! But if it comes back again of its own accord ....

Can anyone help please?
You can get clusters check and replaced by specialists. Not fords!!!
I know a place that would clone your cluster for £99. Cartronix it's called. Depending where you are. Or you could sourest a unit from a breakers and then have that programmed to you car but you will need both keys for them to do it.

I have a problem with my cluster, the LCD light won't go out when you lock up.
 

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Discussion Starter #6
Just a thought and a 'NO COST' check to dismiss the possibility.
LCD's don't like cold weather and or low battery voltage. Batteries really drop their output voltage when they get cold, so although you may show 12-13½v when warm you can lose a big chunk of that when the temperature drops overnight in cold conditions. Next time the weather is cold, load the battery with headlights, heated screens then check voltage output from battery either with multimeter or on the dashboard test routine. As I say a no cost check and I've learned to never dismiss the obvious checks first.
Hope that may help.
'D'
Thanks for your advice. I have been waiting for a cold day in order to get my son to bring his multimeter, then on Sunday the temperature rose to 12 deg and voila there it was back again - a good clear display and no numbers lost!

Thanks again for your reply, I'll check it again next year when the temperature drops.
 

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Thanks for your advice. I have been waiting for a cold day in order to get my son to bring his multimeter, then on Sunday the temperature rose to 12 deg and voila there it was back again - a good clear display and no numbers lost!

Thanks again for your reply, I'll check it again next year when the temperature drops.
I realise this is a rather old post, and wonder if the issue was ever fixed ? I had the exact same problem, and the fix was to remove the dashboard unit, and resolder the pins from the lcd display; make them thicker with an ekstra layer of solder. The female pinheader becomes loose, and problably also the goldplated fingers inside is contaminated with a layer of very bad conducting tarnish... Mine was displying in urdu, but is now speaking proper english again...
regards Lars
 

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I had a similar problem and it turns out it's to do with dry solder on the instrument cluster. This can be resoldered and the faults are cured. Apparently this is a common fault with this version of CMAX.
 

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I think the standard reply for Fords is "they all do that sir". I have a Galaxy that does it as well which I will be trying to solder back up very soon.
 
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