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Intermittently overheating then quickly returning to normal.
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Cornallster

Posted: Thu Jul 02, 2020 6:38 pm

Joined: Jul 02, 2020
Posts: 1
Trade Rating: 0

Hi,

I have a 1.4l Petrol 206 S (2005). I have an intermittent issue where the temp gauge will randomly go from roughly 90 to max within a few seconds causing the stop light to flash and beep. After a few seconds though the temperature will return to normal. I have a video of this happening at this link.

youtu.be/1jJMpJRpvgQ

It seems to happen in all sorts of situations. On some journeys it won’t happen at all whereas on others it will happen 4-5 times. There is plenty of coolant and the fan is working (it comes on when this happens). It doesn’t seem to have any pattern as it happens on journeys of different lengths and in different weathers.

The car is otherwise operating fine. I did recently have to replace the silencer (exhaust) however I don’t expect that to be relevant.

Thanks in advance for any help you can provide.

ekjdm14

Posted: Thu Jul 02, 2020 9:39 pm

Joined: Jan 06, 2020
Posts: 176
Trade Rating: 0
Location: Cheshire

I've recently learned that when the coolant temp sensor (CTS) is disconnected, the car defaults to fans on/overheat warning. Check the connection to the CTS on the side of the head, if the wiring and connector are all in good shape then it's possible the sensor itself is failing and intermittently going open circuit.


	'02 1.4HDi Mercury Grey 102k (waiting for it's time to shine once more) '03 GTi 180 Aegean Blue 92k (suffering gearbox/diff issues) '53 Obsidian Black XUD9TE/veg fuelled b-road toy (in surgery for MoT workarounds) '56 SW 1.4i Verve Aegean Blue 70k (new £50 project with roasted lump) +'95 Citroen Xantia 1.9D auto (on loan to inlaws) +'99 306 2.0SE cabriolet +'97 306 1.9LXDT French Car Forums

gazza82

Posted: Fri Jul 03, 2020 7:25 am

Joined: Jun 19, 2010
Posts: 1599
Trade Rating: +4
Location: South Bucks

Was the sensor on the thermostat housing when that happened on my 1.4 Hdi


	Down to just the 1.4 HDi. Cayman Green 2.0i CC sold.

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