Question about 1985 Chevrolet Monte Carlo

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Heater dont turn on

My heater dont turn on but i can here that it did but no air or heat comes out

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Bad thermostat, or even worse a bad heater core.

Posted on Dec 03, 2012


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When you turn on heater it dont blow hot & it dont change to vent, defrost,floor

The control head that select heat/cold and where the air goes is vacuum controlled. There two vacuum "motors" under the dash that are used to move the blend doors to the heat or A/C position and for routing the air to the proper vent ducts. If neither is operating, chances are that the vacuum line that comes to the control head is broken. You need to locate it and repair it. If it is good, then you have issues in the blend box with the blend doors or the vacuum motors.

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Ford Taurus 2007 air condition is OK, however I get cold air when heater is turned on. Antifreez level is OK.

replace thermostat before you do anything else.. If it is stuck open there will be not heat

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Had a leaking pipe changed the large pipe that runs from the front of the engine to the heater has two branch;s smaller bore since changeing no het getting to car.

possible air in your system you need to bleed air out of your system make sure heater valve is open and radiator cap open when car is cold take all air out and fill as needed

Jan 19, 2010 | 2001 Jaguar S-Type

1 Answer

Heater problem

You should take a look at heat gauge on thecar, If its comming up to tempature you can rule out the thermostat, Check the coolant level to. If all these are fine,

Your looking at these possibilitys*sp

A. Heater Core has broke -Can you smell coolant with the heating sys on?
B- BDA has broken and not opening the blend door to allow heat in
Best way to check that is to change from Vent to something else and see if the air comes out of those or just sticks in the same place

And it also makes a click click noise sometimes.

Also check to see if coolant is flowing round might be an air block somewhere.

Jan 08, 2009 | 1995 Lincoln Town Car

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Heaters dont work on my mk3 golf cabrio

if the blower motor is gone u will get no air cold or hot.
If it is the switch you would hear the blower but maybe get no hot but just cold air or vice versa.

Jan 07, 2009 | 1996 Volkswagen Golf

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No heat

1 Inspect Cooling System Mix Coolant level low or flow is restricted. grey_line.gif 2 Inspect Thermostat Thermostat stuck closed grey_line.gif 3 Inspect Heater Control Valve Leaking or defective heater control valve.

Dec 04, 2008 | 2002 Pontiac Aztek

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Cold air coming out car heater, turn heat up to 90

check water level in rad if ok check thermostat or couldbe a plugged heater core.also check for vacum to heater door is working

Nov 13, 2008 | 1998 Mazda Millenia

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when the engine gets hot thats when the hot air comes? well no ****. Where do you think the magic hot air comes from then?

you have almost ten questions on here about this car. One you said the motor wont start. anouther you said the car runs but then stalls when you stop or turn. so why dont you post what is actually wrong with it so it can get fixed?

Oct 23, 2008 | 1992 Cadillac DeVille

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Heater blows cold air

the electric motor that open the heat door looses electrical connection there by the door stays on cold / it is located under the a/c heater assembly / which requires removing the whole dash and heater assy// also bleed all air out of coolant system
there are three doors / 1/ a/c heat 2/ mode /defors 3/ recurculation

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