Question about 2003 Volkswagen Passat

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Lukewarm heater - 2003 Volkswagen Passat

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Try flushing the heater core ,if outside temperature is below about minus 5c then put some cardboard in front of the rad

Posted on Jan 04, 2011

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Posted on Jan 02, 2017

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2003 ford taurus blows lukewarm when the heat is on. Blower blows fine and a/c works great.


Check out the heater hoses for warmth. Both should be the same with the water flowing. If they are not, the water is not circulating.

There are 2 ways the heater can work. One style varies the amount of water flow to control the heat levels. The other uses the blend flaps in the ducts to push air flow around the heater core.

If the heater hoses are not circulating water, a part called a flow valve is to blame. Check out the autoparts sites for photos of the flow valve for your car. If you have the blend flap system, a solenoid called a "motor" is not changing the position of the blend flap in the dashes' ductwork.

Oct 01, 2012 | 2003 Ford Taurus

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I just had a new thermostat put in my 2005 pilot because only cold air seemed to be blowing - lukewarm at best. They also fluched and put in new anti freeze. It seems better but not great. Now my center...


Had the same problem on a 2006 pilot LX. Hot from rear heater because it comes from a separate heater core. Front heat low because ball valve faulty that controls coolant flow to heater core. The lever on the valve would move freely but the connection to the shaft of the ball valve was stripped. Ball valve may be located on the firewall under the hood. Ball valve very poor design.

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HEATER ONLY BLOWS OUT LUKEWARM AIR, HAD RADIATOR FLUSHED AND NEW THERMOSTAT INSTALLED BY MECHANIC. WHAT COULD BE WRONG ?,


i have a 99 ram 1500. i change the blower motor and thermostat. and it still blows lukewarm. how can i fix the problem.

Nov 09, 2010 | 2002 Mercury Sable

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1995 and 2000 Ram 2500, No heat.


you may have an air pocket in the cooling system try bleeding it off or you may have a bloked heater core
have you replaed a waterpump latelyl

Dec 04, 2009 | Dodge Ram Pickup 2500 Cars & Trucks

1 Answer

1998 Tercel Cold heat to the windshield. Lukewarm out front vent.


Hey,

I just replaced my thermostat in my car due to the same problem. Except mine was a 92. I figured I'd start with the thermostat and antifreeze. Then the heating core. Now I have heat.

But yet I still have no heat on the windshield.

Oct 23, 2009 | Toyota Tercel Cars & Trucks

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Heater is blowing lukewarm air?


check your heater core cable but mostly likely cause is you need a thermostat

Oct 09, 2009 | 2000 Honda Accord

1 Answer

Heater Blows cold to lukewarm even on high setting.


Water control valve is not opening. cable may be off due to heater core replcement

May 23, 2017 | 1997 Chevrolet Venture

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