My car is blowing Cold air from Heater at idle and in lower speeds, thermostat and coolant is changed recently and also air bubbles were removed from resorvoir, please advice on what could be the problem, Thanks!
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2003 Nissan Altima
Question: Cold air from Heater at idle and in lower speeds
Answer #1goodguy February 21, 2013, 14:22Master
check your blend door operation
Answer #2wetry February 21, 2013, 15:48Master
Does the engine overheat at all during extended idle?? If so possible worn H2O pump impeller. Also partially restricted heater core can cause this. Make sure it is FULL of coolant.
Answer #3rictardo February 23, 2013, 15:59Rookie
May be pocket(s) of air in the coolant system. If the coolant has not been replaced in awhile, try having it flushed and replaced.