Question about 1996 Saturn SC

2 Answers

1996 Saturn's heater not working right

Heater is hardly blowing out, and it's not warm or hot air--but cool. Also--side windows fog up, and don't seem to defrost.

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  • Doraville2 Jan 10, 2009

    Heater in my LW300 6cyl wagon blows air that is barely warm when cranked. tried flushing, new thermostat, no luck

  • justme2050 Jan 15, 2009

    I have the same problem.My heater is not working at all and the windows fog.

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2 Answers

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  • Contributor
  • 33 Answers

Heatercore is done

Posted on Dec 08, 2008

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  • Saturn Master
  • 2,359 Answers

When the engine is cold,check the coolant level.

Make sure it's on max.

===

A coolant system should be flush every two years.

===

If you did a coolant flush recently then air pocket can be the cause of the un-even heating problem.

The DIY method is to drive you car onto a ramp or a steep hill.

Iet the engine cool off and top off the coolant tank.

Set MAX heat + MAX fan

Let the engine ran for 20 minutes wih the cap off and the trap air will escape from the coolant reserve tank,

Check coolant level and top off coolant when the engine cools down.



A shop will charge $75+ for this but using an air operated excavate tool!

========

A car with over 90K miles may experience linkage problem to the heater control valve.

The heater control valve (near the firewall) may be stick over time.

Open the hood and move the heater to max and min. Back and forth.

Clean and lube the linkage with WD-40 to free the heater control valve.

If it's a vacuum type heater control valve then cash for leaky vac. hoses.


=======
Move the fan switch back and forth to re-new the electrical conductors.

Pass a vacuum over the control panel to prevent dust build up behind the console.

Posted on Dec 03, 2009

1 Suggested Answer

rtpflh
  • 546 Answers

SOURCE: 1999 Volvo S70 heater and defroster blowing "fog"

suspect leaking heater core.check coolant level.

Posted on Sep 29, 2009

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Why does my heat blow warm air then it turns cold


its VERY likely that your heater core is getting stopped up.

The heater in your car works by circulating hot water from the engine into a copper or aluminum pipe coiled up in the dashboard. The heater/airconditioner's fan blows across it and the hot air comes out of the vents. This is why the heater doesn't work right away when you first start the car. It usually won't work until the hot/cold needle in the gauges is starting to rise up.

If your mechanic recently replaced the thermostat, its possible that there is air in the system which will result in less antifreeze in the car than it should be. If this is not the case, the heater core is probably stopping up and will require expensive replacement if it cannot be flushed clean.

Check to make sure the car is full of antifreeze IN THE RADIATOR, AND THE OVERFLOW JUG. Please be very sure there is NO AIR in the cooling system as well.

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