# coolant mixture, TSU or thermostat?

**URL:** <https://forums.speedlife.net/t/coolant-mixture-tsu-or-thermostat/141041>\
**Category:** Canada Nissan Automotive\
**Created:** [January 6, 2006, 12:29pm UTC](https://forums.speedlife.net/t/coolant-mixture-tsu-or-thermostat/141041 "2006-01-06T12:29:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![FRLDYZ](https://avatars.discourse-cdn.com/v4/letter/f/90ced4/32.png) [@FRLDYZ](https://forums.speedlife.net/u/FRLDYZ)\
**Post date:** [January 6, 2006, 12:29pm UTC](https://forums.speedlife.net/t/coolant-mixture-tsu-or-thermostat/141041/1 "2006-01-06T12:29:18Z")

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every few minutes, my cars engine temp will rise to 250~ and the heating on the interior will cut out, and just blow cold air. so im wondering if its the thermostat, TSU, or simply just bad coolant mixture for yellowknife weather