No heat at idle - Nissan Forums : Nissan Forum
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post #1 of 4 Old 01-30-2009, 02:50 AM Thread Starter
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No heat at idle

Im usually good at this, and can trouble shoot pretty well, but here in rhode island its been pretty cold and want a quick solution before I trouble shoot and overspend.

I have the 2.5 (probably wont make a difference) but at idle I have no heat, car's warm, heats on, just none pumping, at take off and cruising I get heat, so Im thinking im only getting engine heat blowing through.

someone told me change thermostat but that would a cooling issue, or could it be? another thing Im thinking I have is a hickup in the system, maybe old or to not a good radiator fluid mix.

any suggestions?

2002 Altima 2.5 Sheer Silver (KY1)
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post #2 of 4 Old 01-30-2009, 03:13 AM
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post #3 of 4 Old 01-30-2009, 05:15 AM
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its blowing cold at idle and you get heat when you rev it .

99% , your coolant level is low .

1. turn the car on (from cold)
2. turn on heat
3. open hood
4. take off radiator cap
5. add coolant , try not to spill it (if you want , use a funnel)
6. let the car start to come up to temp
7. as the thermostat opens and more coolant gets sucked in , add more coolant , you might have to do this more than once .
8. put radiator cap back on .


Last edited by jimnolimit; 01-30-2009 at 05:49 PM.
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post #4 of 4 Old 01-30-2009, 03:07 PM
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You have air in your coolant system. I just brought mine to a shop and they drained it and put a sealant through it and refilled it and it has been fine ever since. I was constantly refilling my coolant overflow tank to max level once a month becuase it was disappearing but I think its just becuase I couldnt catch up to the amount of air that was in the system.

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