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Heater blows cold air when rpm's are at idle

(1999 Infiniti I30)
in Rogers, AR on February 06, 2011
Heater will only blow hot air when rpm's are higher than idle.
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Popular Answer
on February 06, 2011
You most likly have a air pocket in your coolant system or it could be low on coolant. just dont add coolant when the system is hot it could cause injury.
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