In the truck the heat will work for a little while then it will automatically start blowing cold air with the heat on high. What is making it do this?
Thursday, January 17th, 2013 AT 2:20 PM
Check to make sure the coolant is full. Also, when this happens, feel the heater core hoses. THey should be hot. If they aren't, then you may want to flush the heater core. Also, make sure the engine is properly warming up.