The heater on my 2007 Nissan Frontier works while driving, but as soon as I stop, it starts to blow cold air, any ideas?
Check the coolant level. (Do this when the engine is cold) or have a pro check it for you. I'll bet it's low. which means you probably have a leak in the system. When the engine slows the pressure produced by the water pump lowers and does not get circulated into the heat ex changer in the cars cabin. Thus.... cold air.. good luck.
That was the problem, thanks. For some reason it was very low, I must have a leak somewhere.......
bring it to nissan. these are famous for the radiator mixing coolant and transmission fluid and you may have to replace rad and do flushes on tranny and cooling system. do this before you wreck your transmission.
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