2005 Saturn Relay Logo
Anonymous Posted on Jan 22, 2011

2006 Saturn Relay 3: My heat does not work. Not even the front windshield defrost. Air is blowing but the air is cold.

  • Anonymous Jan 22, 2011

    Already checked coolant level. I was not low. How do I check the other things?

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  • Master 4,803 Answers
  • Posted on Jan 22, 2011
Anonymous
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First, check your engine coolant level. If it is low, you need to find out why. If the coolant level in the radiator is full, it could be many things including a bad thermostat, a clogged heater core, or a broken or damaged air temperature door or actuator.

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  • Anonymous Jan 22, 2011

    Checked the coolant level and it is not low. How do I check the other things?

  • Anonymous Jan 22, 2011

    To check the other things, it really requires some specialized equipment. The cooling system operation needs to be verified for proper operation first. This involves accessing the data stream in your onboard Engine Control Module (ECM) and comparing the Temperature Sensor data to readings taken with a pyrometer or infrared thermometer to ensure that the sensor is providing the correct information to the ECM. Once this is verified, the thermostat operation can be verified by using the thermometer or pyrometer and the ECM data to determine at what temperature it is opening. If this all checks out ok, then you move to checking the inlet and outlet temperatures of the heater core to see if it is possibly clogged up. If this is ok, then you move to the inside of the vehicle to verify mode door and door actuator function. Your Saturn may be equipped to by-pass some of this because the ECM or the Climate Control Module might have fault codes present which will lead you to the cause. For instance, there may be an "Engine Not Reaching Operating Temperature" fault code, in which a failed thermostat is almost always the cause, or the Climate Control Module may have a fault code that indicates a mode door actuator problem.

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2006 explorer blows hot air when on heat,turn on defrost and it blows cold air

That's done on purpose to blow dried air at the windshield to help it defrost faster. When in defrost mode, the AC is running. Standard feature on most cars and trucks
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Tips for operating Air conditioning system on Toyota Hilux and someother...

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Make sure the air intake grilles in front of the windshield are not blocked (by leaves or snow, for example).

On humid, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

Keep the area under the front seats clear to allow air to circulate throughout the vehicle.

On cold days, set the fan speed to high for a minute to help clear the intake ducts of snow or moisture. This can reduce the amount of fogging on the windows.

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HEATING

For best results, set controls to;
Fan speed ---- Any setting except "OFF"
Temperature----Towards WARM (red zone)
Air intake ---- FRESH (outside air)
Air flow ---- FLOOR
Air conditioning ---- OFF

For quick heating, select recirculated air for a few minutes. To keep the windows from fogging, select fresh after the vehicle has been warmed.

Press the "A/C" button on for dehumidified heating.

Choose floor/windshield air flow to heat the voltage interior while defrosting or defogging the windshield.

AIR CONDITIONING

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

For quick cooling, move the air intake selector to recirculate for a few minutes.

VENTILATION

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

DEFOGGING

The inside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone) to heat; COLD (blue zone) to cool
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- ON

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

On humid days, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

DEFROSTING

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

To heat the vehicle interior while defrosting the windshield, choose floor/windshield air flow.
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I have a 2007 Saturn, Aura. Heater does not blow hot, slow coolant leak, & it also over heats. Please help! I'm freezing when I'm in my car!!!

You need to fix the coolant leak, then refill and bleed cooling system, then you will get heat and cure overheating problem too
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Why does My thermostat Not switch between ac,heat,defrost . there's cold air coming out of vents but not cold enough to be ac. Initially when this started the ac was blowing hot air

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Heater blow cold air in front hot air in rear

could be blend doors in heating duct work.
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The rear heater blows cold air and front does not blow at all. The only place that warm air comes out, is the defroster vents on the dash by the windshield. It actually warms the entire vehicle, but n

i hadsimale problems on my taho the ac wul not blow cold n the back only the heater would blow and the front would not blow i had to chang the front blower motor and the blower motoer relay in the back every thing is on the top of the rt pass wheel hump swap them out there the same parts to see what broke hat stuf is expencive hope this helps
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A/C will only blow through defrost vents

Common question on this site. On late model cars, the vents are controlled by blend door motors. Small electric motors open and close doors to direct air flow.
Chances are you have a blend door that is stuck or a failed motor.
The default position is the defrost to make sure the windshield is always clear.
Someone will need to look behind the dash to see if all of the doors will move on demand.
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Sounds like defrost door on heater box is not work You need to get under dash and check controls on the box. Good luck
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