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Jeep Wrangler JK
JK General Discussion
Radiator fan on 2012 JK stays in high speed
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<blockquote data-quote="MacGuyver" data-source="post: 441398" data-attributes="member: 18877"><p>I had this recently and it was because the radiator was a bit low, just low enough that internal pressure wouldn't get high enough to exchange coolant with the reservoir. </p><p>When the engine is cold, open the radiator cap and dump a bit in. The coolant reservoir is not the place to add. If you can't add any at all then it may be something else, but this is the easiest first check.</p></blockquote><p></p>
[QUOTE="MacGuyver, post: 441398, member: 18877"] I had this recently and it was because the radiator was a bit low, just low enough that internal pressure wouldn't get high enough to exchange coolant with the reservoir. When the engine is cold, open the radiator cap and dump a bit in. The coolant reservoir is not the place to add. If you can't add any at all then it may be something else, but this is the easiest first check. [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
Radiator fan on 2012 JK stays in high speed
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