Question about 1997 Mercury Sable

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No warm air in car. both heater hoses are hot when car is at normal operating temp. If it is the blend door, what can I do with it.

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Wedge it closed for now

Posted on Nov 18, 2009

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2 Answers

Heater doesnt seem to be hot enough


Go under the hood and feel the heater hoses after the engine gets up to temp, if they seem really hot then you may have a problem with the HVAC air temperature control blend door.

Nov 08, 2016 | Cars & Trucks

2 Answers

The heater is only warm until the fan is turn on then it blows cool air


Does the engine reach normal operating temp? Are the heater hoses hot? You may need to check temp door under the dash and hvac controls. Are there any hvac trouble codes?

Dec 22, 2015 | 2006 Buick LaCrosse

1 Answer

Newheater core new thermostat clean hosesnew anti freeze why no heat?


Depends.
Are the heater hoses getting hot ?
Is the engine warming up to normal temp ?
If yes, you could have a problem with a blend door under the dash.
The blend doors direct air thru the heater core and the vents.

Dec 23, 2012 | Cars & Trucks

1 Answer

Heat blows out air but does not get warm, any ideas?


If it is faulty, yes.
Does the temp gauge show the engine is warming up to normal temp ?
Is the radiator full of coolant ?
Are the heater hoses getting hot ?
It could also be a faulty blend door under the dash. The blend doors direct air thru the heater core and the vents.

Sep 28, 2012 | 2000 Ford Taurus

1 Answer

I have a 99 durango i have replaced heater core water pump thermostat and all hoses still barley any heat just warm vehicle comes up to normal temp does not over heat but still no heat please help


Are the heater core hoses getting hot? That could be a blockage in the intake manifold or engine block. Is the blend door sticking? That would be one item that would make for lukewarm air if the hoses feel nice and hot when up to operating temperature.

Jan 23, 2011 | 1999 Dodge Durango

1 Answer

Heater is not blowing hot air nothing has been bypassed


disconnect both hoses at the firewall that go directly into the heater core and apply a low amount of compressed air through one side and see if it is plugged if it isnt plugged let the car warm up to normal operating temp.then shut off car and feel the upper and lower radiator hoses they should be very close in temp. if ones hot and the other is cold check thermostat if both of these (hoses and heater core) check out good,the problem most likely is going to be a broken blend door and that involves removeing the insturment panel(dash board)

Jan 10, 2011 | 1998 Plymouth Breeze

1 Answer

My heater in my car will not get warm... The temp guage reads normally but was wondering why the heater will not heat up?


These taurus' have a notorious problem with the blend door actuator(controls hot and cold air mixture) failing.This is located in the cab of the car underneath the dash right in the center.This is not a diy project unless you have fairly extensive mechanical background.What you can check with ease though is to make sure that your coolant is full, this can cause a no heat condition.Also get your car up to normal operating temp and place your hands on the inlet and outlet if the heater core hoses, on the engine side of the firewall, and make sure both hoses are hot, if they are both hot then it is a blend door issue, if not then you have a restricted heater core, you can back flush your heater core by removing the hoses and placing a garden hose to either side and flushing it thru. I hope i could help....rate me accordingly.Thanks!!!

Oct 08, 2010 | 2001 Ford Taurus

3 Answers

Car warms up just fine but the heater blows cold air


both hoses is hot signifies thatcoolant circulation is just fine check the blend door actuator it might be stuck.pan the heater temp controller from hot to cold do you feel any change in temp of the air from the blower?if you dont feel any change check the blend door actuator

Jan 11, 2010 | 2002 Ford Taurus

1 Answer

Why wont the heater blow hot air, the core doesnt look clogged?


Hi


Thanks for using FixYa. Try and check if the heater core is plugged. Find the 2 coolant lines going to the heater core. They are right next to each other with approx 3/4" hoses going to the engine. Now, warm up the engine with the heater on max (don’t turn on the fan). Next, feel if the hoses are warm (maybe HOT!) If they are not warm, then you most likely have a plugged core. A back flush will resolve the issue. If your hoses are warm, turn on the fan. One hose should go cold (or cooler than the other, actually should be about the same temp as the air from your air vents, if there is a plug). If both hoses are hot and stay hot, and you have no heat, then the problem is not with the heater core but with the blend doors.


There are electric motors that operate the "blend doors" inside the dash directing air flow from the heater core and A/C evaporator core to the cab of the vehicle. If you feel a drastic difference in one of the radiator hoses, then try replacing the thermostat and see what happens. If all the heater and radiator hoses are pretty much the same temperature I would suspect a control problem in the dash controls or in the blend door operation. You’ll need to remove the dash to check these.


Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks

Rylee

Dec 27, 2009 | 1991 Mazda MPV

1 Answer

Heater does not blow hot air on full heat setting


the problem is caused by the motor that operates the air temp blend door motor in the heating ducts, it blends air between AC and heater core tro give desired outlet temp.

Dec 12, 2008 | 2000 Chevrolet Silverado 1500

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