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Faulty thermostat on Citroen C3

I'm having a problem with the temperature gauge on my Citroen C3 - it keeps going into the red and setting an alarm off. I have replaced the temp sensor and fan but it still does it, normally after heavy traffic. Any ideas?

Asked on 26 September 2013 by sally1312

Answered by Honest John
I'd guess that there must be a blockage somewhere. Could be that the thermostat has seized shut.
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