Question about 1997 Lincoln Mark VIII

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Heater blows cold air

Heater coil leaking

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  • Contributor
  • 4 Answers

If anybody has used stop leak in the system sometimes it will clog the heater core. That is a possibility.

Posted on Jan 18, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 2920 Answers

SOURCE: heater blows cold air

check the coolant level on the radiator to make sure its full.

Posted on Jan 24, 2009

  • 1 Answer

SOURCE: 2002 Lincoln Navigator. Heater is

try changing the thermostat if thats not it check and see if you have water leaking in the passenger side floor board if so then you need a new heater core

Posted on Feb 24, 2009

cadman000
  • 607 Answers

SOURCE: problem with front air switching to heat when accelerating

Check for a vacuum leak. WHERE is the magic question.

Posted on Mar 27, 2009

dmftrucker
  • 1922 Answers

SOURCE: Heater wont blow hot air in my 1998 Lincoln Navigator

the computer that controls the deflector motor are not responding and opening the door for heat, I'm sure you have climate control,check the temp setting sensor to the computer input first

Posted on Nov 01, 2009

warlock61
  • 659 Answers

SOURCE: On my 1997 Lincoln Mark VIII, the air conditioner and heater are

check the sensor in the dash near the controls looks like a tiny vent see if it has dust build up

Posted on Dec 10, 2009

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Hearter blowing cold air


If The heater is blowing cold air, it could be either the thermastate is stuck in a closed position and you need a new one, or your heater coil has gone out. The way you determine if this has happened , check to so if water is leaking from under dash on the passenger side. If it is leaking, it's your heater coil..

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2003 Grand Prix not blowing hot air. Does the heater coil need to be replaced? If so where is it located?


If the heater coil was bad, it would be leaking radiator fluid... probably into your dash/floorboard (depending on where it is installed in your model car). There is a switch that diverts the hot radiator fluid through the heater coil when you want heat. There is also an air diverter valve that helps to mix the hot and cold air. The fluid valve is controlled by the A/C settings control. The one that you use to choose between heater/air conditioner/vent/ defrost. The air diverter is controlled by the temp mixing controller. The most simple explanation is that one of those valves or the controller of one of those valves is not working. If the hot water cant be diverted through the heater coil, the coil can't exchange the heat (warming the air). If the air diverter (hot/cold controller) cant move to add heat, then all you will feel is air from the vent side (from outside) or from the A/C cooling the air.

I would guess that its either a controller or one of the valves themselves. Odds are, it is a controller. That tends to be what malfunctions first.

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On my 1995 chevy blazer s-10 my face vents are not blowing air


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Jun 02, 2009 | 1995 Chevrolet Blazer

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When i have the heater/defroster on the heater below blows cold air while the defrost blows hot. when i switch to just defrost the bottom heater stays on and blows cold air. when i have front dash and...


It sounds like you have a blend air door stuck. This is in the housing of the heater a/c blower unit under the passenger side of the dash. There is a motor on the top of the housing that could possibly be stuck or on working.

May 10, 2009 | 2003 Dodge Durango

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Ac compressort had to be replaced because it seized up. AC ran good for 2 weeks then went out, now the heater doesnt want to work half the time. i dont know if its my heater coil, a leak in my ac lines,...


THE BLEND DOOR THAT CONTROLS HOT TO COLD SWITCHING IS STICKING. THE CONTORL HEAD IS ELECTRIC AND MAY BE CAUSING THE PROBLEM. HEAT AND AC ARE 2 COMPLETELY DIFFERENT SYSTEMS EXCEPT FOR THE CONTROLLER UNDER YOUR RADIO. HEATER COIL IS REALLY A HEATER CORE WHICH IS A LITTLE RADIATOR INSIDE THE CAR BEHIND THE DASHBOARD.

Mar 22, 2009 | 2004 Dodge Intrepid

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94 Grand AM NO HEAT, just blows cold air


your description ends. what have you put in...
if you have put stop leak in the car it can clog your heater core.
check your thermostat
check your engine oil if it looks milky you have a head gasket problem aslo check your coolant if there is oil in your coolant you have a head gasket problem

Feb 04, 2009 | 1994 Pontiac Grand Am

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