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Author Topic: Running Hot Again  (Read 1336 times)

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star_whites

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Running Hot Again
« on: 25 July 2010, 19:05:41 »
Ok, I've changed my radiator for a known good one and replaced the fan switches, however she is still getting too hot. It's a 3.0 auto estate it was fine on tickover however when driving the temp went up towards 100 but notover.

I pulled up and checked if fans were on and it appears that aircon rads were working overtime, however the main fan had not gone on to second speed.

How is this fan controlled and does it have a differentswitch?
« Last Edit: 25 July 2010, 19:08:38 by star_whites »
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duaneyb1

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Re: Running Hot Again
« Reply #1 on: 25 July 2010, 19:35:01 »
Hello mate, have had the same problem except mine has been going over 100. as far as i know the first fan speed comes on at 97.5 and the second fan speed comes on at 102.5
i have recently done a big cooling system flush with a holts 2 part flush, first part strong chemical and second part to neutralise the chemical. anyway, this has improved my running temp alot. I dont know if this will help you. if not other things you could check. water pump,heater bypass valve,thermostat, :y
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star_whites

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Re: Running Hot Again
« Reply #2 on: 25 July 2010, 19:54:53 »
System has already been flushed and the thermostat/radiator/temp switch/fan switch have all been changed. I think it's the main fan but think I need it testing!
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Elite Pete

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Re: Running Hot Again
« Reply #3 on: 25 July 2010, 19:55:45 »
Have you confirmed the gauge is correct?
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star_whites

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Re: Running Hot Again
« Reply #4 on: 25 July 2010, 19:59:37 »
No I haven't, but it used to be spot on. It just started getting hotter when the weather changed and it got hotter!
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PhilRich

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Re: Running Hot Again
« Reply #5 on: 25 July 2010, 20:07:03 »
Here is a link to the fan test diagramme. HTH  :y

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If it ain't broke keep fixing it 'til it is!

tidla

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Re: Running Hot Again
« Reply #6 on: 25 July 2010, 23:40:11 »
you doing over the bellagio??
« Last Edit: 25 July 2010, 23:40:52 by tapper888 »
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TheBoy

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Re: Running Hot Again
« Reply #7 on: 26 July 2010, 08:36:57 »
If anyone near you has a code reader capable of reading the info, post up the Code Index of the panel.
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star_whites

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Re: Running Hot Again
« Reply #8 on: 27 July 2010, 08:07:49 »
Unfortunatly there is no one nearby with a reader that Im aware of. However I will do a paperclip test and see if there are any codes stored and post that!
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star_whites

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Re: Running Hot Again
« Reply #9 on: 28 July 2010, 23:45:53 »
Ok, I have done paperclip test and the only codes stored were 12 & 31. Anyone know what theses are?
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Elite Pete

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Re: Running Hot Again
« Reply #10 on: 29 July 2010, 07:24:19 »
Quote
Ok, I have done paperclip test and the only codes stored were 12 & 31. Anyone know what theses are?
They're both normal. You get 12 at the start and ending of the sequence and 31 is normal if the engine isn't running.
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star_whites

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Re: Running Hot Again
« Reply #11 on: 29 July 2010, 09:40:24 »
Another thing I haven't ruled out is that the fan is shot. When listening to it running it sounds unbalanced and not at a constant speed. I'm wondering if bearings have gone. :-?
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