When my 04SE is at stand still (at a stop light), the heat goes from hot to cold (even when the temp is at 90 degrees). Not sure what the problem could be. If anyone may have a guess at this, please post a reply. Thanks.

 

Radiator Flush

 

you have air in the lines...need to put the car on a steep hill n go thru a few procedures that i dont know.lol sorry. im gunna search around n get back to you.

 

Read This.
http://forums.maxima.org/showthread.php?t=547501
And do a search. This has been brought up about 5 times in the last month.
Good luck

 

Try just topping off the coolant if its low. Thats all I had to do and I never experienced the problem again, it happend to me at a drive thru last year.

 

Same problem....no coolant....immediately fixed.

 

Same problem of weird heat -- my coolant was low too. What really bugs me is how did the coolant get low? I can't find anywhere that it would have leaked from the system and there are no tell tale signs of coolant on the driveway.

 

It dosent last forever it's still a liquid, it evaporates over time. No big deal I just check mine every couple of months.