S3 Coolant Pressure

Marine_918

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Hi guys,

I seem to be having issues with my coolant on the S3. For the last week my Coolant warning light has come on the dash intermittently. l have checked the coolant level and it was below minimum so I topped it back up. After a few days the same thing happened again however when I took the cap off the expansion bottle the coolant went back up to normal level. Is this normal for cold conditions or is there a pressure problem? There are no signs of leaks and as I said when I take the cap off the coolant goes back up.

Thanks