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
2 answers
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
possible blocked heater core