My car heater not blowing warm air aircon works fine

Check your engine coolant level. The anti-freeze/water mix that keeps your engine from overheating also provides heat to the interior of the car. As the coolant circulates, it gets warm in the engine and then cools off when it goes to the radiator. Part of the loop is a heater core (small radiator). When you want heat, a fan blows air through the heater core and into your heat ducts. Air conditioning has its own completely separate system, so it's not unusual that one would work while the other doesn't.

I owned Toyota wish 2004 heater is not working and ac and fan working fine m changed the heater fuse but same problem in heater after changing the fuse plz tell me solution

The air blender controller which controls hot/cold air gate is malfunctioning. It can easily be removed for repair or replaced. It just located beside the parking break pedal on the driver side.

2004 Toyota 4Runner not blowing hot air