My heater isnt working. My dad said i must not have enough coolant in the radiator, but the resevoir is half full when the truck isnt on. what else could it be, or do i need to add more water to my coolant? The air still blows out of the vents, its just not heating at all.

 

What vehicle are we talking about here? Year/model....

 

1999 ford f-150 4x4

 

You should check the coolant in the radiator as well. There may be some in the bottle but still low in the radiator. Normally when it is just a little low, it will start to blow warm air as you speed up. You may also have a stuck thermostat or some ac/heater blend door probs.

 

Does the engine reach normal operating temp in the normal mount of time?

Marty

 

yah it reaches operating temp just fine. and it doesnt get close to overheating or anything

 

I would make sure the blend door is operating correctly next.