Nissan has issued a service bulletin for this problem. 2002 – 2006 ALTIMA; POOR HEATER PERFORMANCE Reference NTB02-047c
The fix is inexpensive and can be done yourself if you have enough confidence. In simple terms, your coolant mixture maybe incorrect or you may need to bleed air bubbles from your cooling system. I assume you get heat when you press on the acceleration pedal, the procedure should not cost you more then $60 with a honest mechanic.
P.S, nothing is wrong with your motor, this is a known issue on altimas
Last edited by superkid667; 01-22-2009 at 07:28 PM.
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