Nissan Repair: heater, coolant level, hose clamps

Question
Hello, I have an 2005 altima 2.5 and the heater wont blow warm air until you reach 50mph.  Coolant level is full.  Help !!!!! Thank You in advance....    Lee

Answer
Lee,

If you have not done any work on the cooling system, as of late.  Then, I would say the thermostat is stuck open and needs to be replaced.  If you have worked on the system, then there is air trapped that needs to be purged.  Remove one of the heater hose clamps and allow the air to bleed out of the system until coolant runs out and then tighten the hose clamp back.