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Temp goes down in traffic

Posted: Fri Apr 28, 2023 11:35 am
by 2008tdihighline
Hello

I've noticed my 2.0tdi temp gauge goes down when the engine isn't up to temp and I'm sat in traffic. For example it's slowly going up to 70 degrees, I wait at traffic lights and I can see it dropping.

It's fine once it's up to 90 degrees though. I believe even with the heater off it still does it.

I see the tdi has 2 thermostats, one listed as coolant and engine...

Thanks

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