No heat in '04 Forester

[4-2LGW]

The heat control is all the way up, the blower is on full speed and there is
very little heat. What are the things I should check?

 

[johninky]

The heat control is all the way up, the blower is on full speed and thereis
very little heat.  What are the things I should check?

First check the coolant level. No heater will produce heat if the
coolant is low. Also check for an air bubble in the system.

 

[johninky]

Another easy/no cost check involves feeling the hoses that connect to
the heater core. With the engine up to operating temperature, grab
the heater hoses under the hood. Both should be too hot to hold onto
if coolant is circulating. If both are hot then a problem under the
dash somewhere.

 

[StephenH]

The heat control is all the way up, the blower is on full speed and thereis
very little heat.  What are the things I should check?

My guess is your Subie has consumed or leaked enough coolant to put a
air pocket in it. is the res empty? open the rad cap, Is fluid up to
the top? yes, then disregard the following. Add coolant to the res,
fill the rad full and cap. idle car with it off both defrost settings
until A: hot air blows from the blower, b: the cooling fans kick on by
themselves. You may need to hold the rpm's at 2000-3000 to get the
fans to turn on. When the fans are on, hot air blowing, and the gauge
is stable at slightly below 1/2 then you turn off the car, turn the
key on and the ac on- this will turn the fans on and cool it, drawing
more coolant from the res into the rad.

 

[4-2LGW]

The engine temp is normal, the radiator and overflow tank is up to the max
position, so I know there are no leaks. I've tried everything that's been
suggested to no avail. Taking it to the local mechanic on 12/28 to change
the anti freeze and check out the heater problem.

The heat control is all the way up, the blower is on full speed and there
is
very little heat. What are the things I should check?

My guess is your Subie has consumed or leaked enough coolant to put a
air pocket in it. is the res empty? open the rad cap, Is fluid up to
the top? yes, then disregard the following. Add coolant to the res,
fill the rad full and cap. idle car with it off both defrost settings
until A: hot air blows from the blower, b: the cooling fans kick on by
themselves. You may need to hold the rpm's at 2000-3000 to get the
fans to turn on. When the fans are on, hot air blowing, and the gauge
is stable at slightly below 1/2 then you turn off the car, turn the
key on and the ac on- this will turn the fans on and cool it, drawing
more coolant from the res into the rad.