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Focus Temperature Gauge Issue


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#1 kingfisher1967

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Posted 02 May 2011 - 04:17 PM

I’ve owned this car for 5 years now and just recently I’ve noticed a change in the behavior or my temperature gauge. Last winter, a few minutes into my journey, if I stopped at any traffic lights, my gauge would go from 'mid normal' almost down to 'low normal' now the weather is warmer, if I drive at speed, or go uphill, the gauge goes to 'high normal'

Today I used the speed dial diagnostic trick and had the real time temperature read-out, again at speed I saw the temperature go as high as 113C (plus it was uphill a bit) at which point the gauge rises to 'high normal'. The odd thing about this is the temperature drops if I'm heading down hill.

I’ve had the coolant changed, made no difference, I’m fairly sure the thermostat is ok, I got the car up to normal from cold outside my house and the bottom hose got hot around 96C, which I think is normal. And for a long time I haven't heard the fan come,

Any ideas? I appreciate any help.

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#2 Dan62

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Posted 02 May 2011 - 07:51 PM

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#3 jeebowhite

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Posted 03 May 2011 - 07:59 AM

Agreed, the only other thing I would have thought of is low coolant level, meaning that as you point your nose sky or floor wise, it then sloshes. if you have a full tank of coolant, it does seem to be more thermostat related.

#4 Dan62

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Posted 03 May 2011 - 09:13 AM

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#5 jeebowhite

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Posted 03 May 2011 - 01:45 PM

LOL nice answer Dan. not too helpful, butamusing none the less ;) lol :P

#6 Dan62

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Posted 03 May 2011 - 08:18 PM

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#7 jeebowhite

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Posted 04 May 2011 - 08:07 AM

True point - that cant be argued with!

Anyway Kingfisher, try the thermostat and please do let us know how it goes!

#8 kingfisher1967

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Posted 04 May 2011 - 04:51 PM

Thanks for the help so far.
I thought the stat was OK, I ran the car from cold and kept an eye on the bottom hose, which about 93C got warm.
The coolant level is fine, no leaks.
So it might be a collapsed hose, a screwed sensor for the fan, or as the replies suggest, the thermostat

#9 Dan62

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Posted 04 May 2011 - 05:34 PM

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#10 kingfisher1967

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Posted 16 May 2011 - 08:44 PM

Thanks for all the useful replies so far. I am getting a mechanic coming next Tuesday to put in a new thermostat. Fingers crossed that sorts it.

#11 kingfisher1967

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Posted 24 May 2011 - 08:48 PM

My friendly mechanic has been and gone.
He didn't change the thermostat because he thinks its fine. There is plenty of heat coming in to the cabin ( hot enough to roast a chicken), but even after revving it as high as he could and taking it for a run with a 'real time temperature gauge' on the dash board, he still couldn't get the fan to kick in, so maybe thats my next port of call.But I am glad that he got the needle to go to 'high normal'

Maybe its a switch? or the fan itself?, Ive googled till my fingers are raw and I'm not coming to any conclusions.

I guess its one of those things that you could throw money at and still now cure.

#12 kendo nagasaki

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Posted 26 May 2011 - 06:05 PM

as for your fan cutting in, I have just replaced my thermostat housing, and had it running for ages after but no fan cutting in, mine is the same, and also a few friends with other fords say the same, it must be down to a good cooling system

#13 kingfisher1967

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Posted 26 May 2011 - 06:28 PM

I'm only worried because is new, Ive had the car over 5 years and its never done it before.
I am paranoid about the cooling system anyway, previous cars ( a rover and a Renault) have all died due to the head gasket going ( normally indicated by a rise in temperature, followed by a large bill). I know fords have a built in 'get you home safety feature' but I'm still trying to avoid the large bill.

Kendo, I do hope the cooling system is good, I'm driving from Brighton to Bracknell on Monday to see family, I shall, of course be driving with the real time temperature gauge . So its, Mirror, signal, maneuver.. Road, speed, temperature.

#14 Preee

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Posted 27 May 2011 - 04:41 PM

Have you tried to manually wire the Fan to test it?

#15 kingfisher1967

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Posted 27 May 2011 - 05:08 PM

I didnt know that could be done Preee. I'll definitely look into that.

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