Question about 1999 Ford Taurus

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Very little heat from heater

Get only luke warm air when cool outside and cool air when cold outside. Thermostat and radiator all seem to work fine. Opposite problem in summer with AC.

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Your heater core may be partially clogged

Posted on Dec 29, 2008

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The selector flap is not moving all the way to cold or hot position. Under the dashboard on the passenger side is a heat/ac box where all the duct work for the vents originates from. inside that box is the radiator for the heater and the cooling coil for the ac. the selector flap between them is stuck or not moving all the way.

Posted on Dec 29, 2008

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Air pocket is trap in the cooling system..

Put you car onto a pair of oil change ramp / or steep hill with radiator cap off (when cold).

Look for air bubbles to purge for the system.

Jan 13, 2014 | 1995 Ford Crown Victoria

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98 grand cherokee little heat.heater hoses hot top rad warm bottom is cold collant barely luke warm


While it doesn't seem likely, if you've changed, or had the thermostat changed.... I'd say you got a faulty thermostat. I am curious as to what your temperature gauge says the temperature of the engine and coolant is.. If your gauge is showing hot, I can think of two more possibilities... the water pump isn't pumping right... and, if the water pump isn't working right, the problem can be a cracked head or block, which can cause an airlock in the coolant system. Check the coolant or radiator cap.

Nov 14, 2013 | 1998 Jeep Grand Cherokee

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No Heat


It Sounds Like You Have Either A Faulty Heater control Valve Or On The High Side A Bad ATC (Automatic Temperature Control). Check The Hoses That Go Into The Heater Core Both Should Be Hot At Normal Operating Temp. If The Outlet side Is cold Or Luke Warm You Have A Bad HCV.

Apr 23, 2013 | 2006 Buick LaCrosse

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95 S10 blows cold luke warm air, I've flushed the heater core and seem to have flow, after engine heats up one hose from manifold is warm, the one going to the water pump is cold, when changing the heater...


If one of the hoses to the heater core warm and the other is cold then the heater core is restricted still. Try disconnecting the hoses at the core and flushing to core with a hose go from one side to the other you can likely clear it out and save it. Also check the radiator cap and radiator it sounds like the system is not holding proper pressure. If this is a 4.3 they have a vary large cooling system and the radiators are knowen to have problems not holding pressure they are leaking and you can't even see it. It leaks in a fine mist and is despursed under the vehicle when driveing . For now i think you can save the heater core but it sounds like you are going to have to do a total mantintance on your colling system when the weather allows

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Heater problem with 1994 Suburban. have replaced radiator, thermostat (3 times). Also flushed the system and have run water (via garden hose) directly through the heater core. the flow seemed good. The...


If your temp is jumping between 150-200 degrees then I am guessing you have an air pocket in the engine where coolant should be. The air pocket moves through the engine and when it gets to the water pump, it looses prime and doesn't move the antifreeze which causes it to warm up. Take the radiator cap off the radiator when the engine is cool. Start up the engine and let it run until the thermostat opens up. As the air moves it's way to the radiator it will escape and you will see the antifreeze level go down. Watch it run and as the level goes down add antifreeze until the radiator remains full. Then make sure your overflow tank is up to the required level and I bet your heater works a lot better after that.

Good luck.

Jan 29, 2010 | 1994 Chevrolet Suburban

3 Answers

Heater


Likely it has more to do with the door that controlls the airflow. Which should be operated by vacum might check and make sure all thevacum lines are plugged in.

Does the gauge in the car show it warms up?

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2004 Tahoe Heating Problems


Did you open the radiator cap and make sure the radiator is full of coolant? Sometimes the hose from the coolant reservoir to the radiator becomes plugged, and the radiator will become low on coolant even when the plastic reservoir is full. Low water levels will prevent the coolant system from getting hot water from the engine to the radiator or heater cores. This will cause the engine to run hotter while the heater appears to not be working.

Feb 15, 2009 | 1998 Chevrolet K1500

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