why does my heater blow cold air when my engine is idleing?
on 2004 Nissan Altima

when i let off the gas my heater starts blowing cold air no matter when where or how it always does it

Asked by for the 2004 Nissan Altima
ck coolant level 1st the poss sluggish blend door. scan codes and try blend doors with a scanner to make sure doors are operating properly
1 more answer
possible blocked heater core