heater not working on 2005 Nissan Altima

the heater only works while the car is in motion, but as soon as I stop at a red light or whatever, it starts blowing cold air. ?????

Asked by for the 2005 Nissan Altima
Hi,
There is a technical service bulletin (TSB) from Nissan regarding this issue. It involves a thorough diagnostic procedure that needs to be followed to help determine the cause of this issue. Here is some of the info below. I would take this to the dealer or a good shop that has access to this TSB and have them check out your car.
Bulletin# NTB02-047c Reference: Date: March 7, 2007
2002 – 2006 ALTIMA; POOR HEATER PERFORMANCE
Air from the heater on an Applied Vehicle:
• Takes a long time to warm up after an engine cold start, or
• Output air cools down and is not warm enough while the engine is at idle, or
• Output air is not warm enough at any engine speed
ACTIONS:
Refer to the DIAGNOSTIC FLOWCHART to determine the course of repair. That course may include all or some of the following:
• Coolant Mixture Inspection procedure
• Coolant Mixture Correction procedure
• Cooling System Bleed Procedure
2 answers
i had the same problem and it was easily fixed. it seems that the antifreeze/ water ratio must be what the car recommends. I had to much anti freeze. my uncle took some out put some water and the heater started working properly.