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2006 Maxima SE is running fine except for when you leave running in park we with or w/o A/C it over heats you cut off it's fixes itself

Is thermostat sticking or is one of the electric fans going bad

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While engine is cold (i.e.: not running for 4 hours or more), check your coolant level. In many vehicles, if coolant goes down there is not enough cooling going on when idling and not moving. If low, add coolant to full line however, if coolant has not been flushed and replaced in over 4 years, just do a flush and fill with fresh coolant as per owner's manual guidelines. Even if that does not solve the problem, your engine will be better off!

If it does not solve the roblem, be sure the cooling fans are working as they should; sometimes, one fan does not work at all and that could cause an overheat especially when idling.

If all is good, there may be a clogged passageway somewhere in the coolant circuit - that should be settled when doing a flush and fill though.

P.S.: Remember to never open a radiator or coolant reservoir cap when engine is hot, you could seriously hurt yourself from boiling liquid coming out!!

Posted on Apr 26, 2017


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Fig. View of thermostat and components


Fig. View of thermostat and components-2002-2006 Maxima

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Drain the cooling system.
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