My 2000 Nissan Frontier v6 is getting really hot. I first noticed it this morning when I was driving and turned on my heat since it was a little chilly. Well after a few miles it still was putting out any warm air. Then the temp guage started going up - after it almost maxed out the heater started getting warm and the temp started going down. I noticed it again tonight while I was driving. The temp guage goes up really high and then the heat only kicks on. Ady ideas my nissan gurus? [&o]

 

have you checked you coolant level? do you have a leak?you sure you don't have air in the system?