Make sure coolant is full. Make sure the engine is running at a normal operating temp. If both are okay, start the engine, allow it to warm up with the heater on high. Feel both heater core hoses when the engine reaches temp. Both hoses should be hot. If they are, check and repair the blend door near the heater core. If only one is hot, flush the heater core.
Monday, March 14th, 2011 AT 3:41 PM