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Post by natlor on Dec 1, 2016 22:17:06 GMT 1
I have a vauxhall insignia 1.8 petrol 2009. I have a fault code 4 coming up (Code 4 - A/C on), the temperature goes straight to the red. Its not actually overheating though? Has anyone got any ideas please?
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dave
Tea Maker
Posts: 702 
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Post by dave on Dec 1, 2016 22:29:55 GMT 1
Can you be more specific
I can't make a lot out of this
When does the temp gauge go in the red
From start or when driving
If it does it when you turn account on might just be a siezed ac compressor causing the belt to slip and stopping your water pump
So more info please
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Post by natlor on Dec 1, 2016 22:45:25 GMT 1
It first happened after driving the car for about 20 minutes, i pulled over and check the engine. It didn't seem excessively hot? Got it back home and disconnected the battery for 10 mins to try and reset but still the same.
I have just gone out to it about an hour later and as soon as i start the engine code 4 comes up and temp goes straight to the red?
I put a new battery on it yesterday but think this may just be coincidence?
cheers for getting back to me by the way.
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dave
Tea Maker
Posts: 702
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Post by dave on Dec 1, 2016 23:14:38 GMT 1
Start with basics
Is there coolant in the system
Is the temp sensor connected or did you perhaps dislodge the wires when changing the batery
Is (Are) the belt(s) OK
Possibly a sticky thermostat (radiator wil be cold but the heater in the car will blow hot as hell)
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Post by natlor on Dec 1, 2016 23:17:12 GMT 1
I have a vauxhall insignia 1.8 petrol 2009. I have a fault code 4 coming up (Code 4 - A/C on), the temperature goes straight to the red. Its not actually overheating though? Has anyone got any ideas please?
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Post by natlor on Dec 1, 2016 23:20:58 GMT 1
Yes coolant level is fine, i checked the temp sensor was still connected ok. if it was thermostat playing up would there be alot of pressure in the hoses?
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Post by natlor on Dec 1, 2016 23:24:05 GMT 1
oh and belts seem fine too?
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dave
Tea Maker
Posts: 702
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Post by dave on Dec 1, 2016 23:24:58 GMT 1
No as you have a pressurised system that will blow of any over pressure via the filler cap
As for the thermostat
It closes of the hoses to the radiator
But will alow flow to the heater matrix in the car so you get hot air as soon as the car starts to heat up
This is a comfort feature and standard practice in 99.9% of vehicles
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Post by natlor on Dec 1, 2016 23:51:48 GMT 1
ok cheers, i will post what the issue turns out to be.
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Post by Noberator on Dec 1, 2016 23:52:04 GMT 1
natlor I have deleted your other thread on this subject.  One thread per subject please I know your a new member thanks. ============================================================================================================================================== I'm trying to figure out what's going on.  Air con won't cause the engine to overheat but a blown headgasket will.  |
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Post by natlor on Dec 5, 2016 9:26:49 GMT 1
Hi guys I thought I would try a coolant temp sensor. Its done the job no code coming up now and temperature back to normal. ☺☺ cheers for your help anyway guys 🖒🖒
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Post by rhyds on Dec 5, 2016 13:51:11 GMT 1
Glad to hear it was that simple.
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Post by Noberator on Dec 5, 2016 16:00:36 GMT 1
Glad to hear it was that simple. Didn't sound simple.  There again start with basics and should never assume the worst.   |
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remmington
Apprentice
Owns Spark Eroder
Posts: 4,974
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Post by remmington on Dec 5, 2016 20:56:11 GMT 1
natlor I have deleted your other thread on this subject. One thread per subject please I know your a new member thanks. ============================================================================================================================================== I'm trying to figure out what's going on. Air con won't cause the engine to overheat but a blown headgasket will. Well done Nobster... |
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Post by Joepublic on Dec 5, 2016 21:23:56 GMT 1
natlor I have deleted your other thread on this subject. One thread per subject please I know your a new member thanks. ============================================================================================================================================== I'm trying to figure out what's going on. Air con won't cause the engine to overheat but a blown headgasket will. It will if the rad fans slow speed resistors are blown, my golf V5 estate spewed its coolant all over Cheshire Oaks multi-storey. |
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